1. A method for jitter-free fractional division, the method comprising:
accepting a first plurality of first signal phases, each phase having a first frequency, where the first plurality is equal to 4 and each phase is separated from a neighboring phase by 90 degrees;
selecting a phase subsequent to deselecting a previous phase selection;
dividing the selected phase by the integer N, supplying a second signal with a second frequency;
using the second signal as a clock, triggering a first plurality of counts in series, using a first count to trigger a second count, using the second count to trigger a third count, using the third count to trigger a fourth count, and using the fourth count to trigger the first count; and,
using each count to select a corresponding phase.
2. The method of claim 1 wherein using each count to select the corresponding phase includes using the first count to select a first phase, using the second count to select a second phase, using the third count to select a third phase, and using the fourth count to select a fourth phase.
3. The method of claim 2 wherein supplying the second signal with the second frequency includes supplying a second frequency selected from a group consisting of (first frequency)(N+0.25), (first frequency)(N+0.5), and (first frequency)(N+0.75).
4. The method of claim 2 wherein selecting the phase subsequent to deselecting the previous phase selection includes:
supplying a first phase signal (CLKOUT1) in response to accepting a first count trigger (SELECT1) and a permission signal (SELECT_OUT4), and supplying a permission signal (SELECT_OUT1) in response to losing the first count trigger;
supplying a second phase signal (CLKOUT2) in response to accepting a second count trigger (SELECT2) and a permission signal (SELECT_OUT1), and supplying a permission signal (SELECT_OUT2) in response to losing the second count trigger;
supplying a third phase signal (CLKOUT3) in response to accepting a third count trigger (SELECT3) and a permission signal (SELECT_OUT2), and supplying a permission signal (SELECT_OUT3) in response to losing the third count trigger;
supplying a fourth phase signal (CLKOUT4) in response to accepting a fourth count trigger (SELECT4) and a permission signal (SELECT_OUT3), and supplying a permission signal (SELECT_OUT4) in response to losing the fourth count trigger; and,
wherein supplying the second signal with the second frequency includes supplying a second frequency=(first frequency)(N+0.25).
5. The method of claim 2 wherein selecting the phase subsequent to deselecting the previous phase selection includes:
supplying a first phase signal (CLKOUT1) in response to accepting a first count trigger (SELECT1) and a permission signal (SELECT_OUT2), and supplying a permission signal (SELECT_OUT1) in response to losing the first count trigger;
supplying a fourth phase signal (CLKOUT4) in response to accepting a fourth count trigger (SELECT4) and a permission signal (SELECT_OUT1), and supplying a permission signal (SELECT_OUT4) in response to losing the fourth count trigger;
supplying a third phase signal (CLKOUT3) in response to accepting a third count trigger (SELECT3) and a permission signal (SELECT_OUT4), and supplying a permission signal (SELECT_OUT3) in response to losing the third count trigger;
supplying a second phase signal (CLKOUT2) in response to accepting a second count trigger (SELECT2) and a permission signal (SELECT_OUT3), and supplying a permission signal (SELECT_OUT2) in response to losing the second count trigger; and,
wherein supplying the second signal with the second frequency includes supplying a second frequency=(first frequency)(N+0.75).
6. A system for jitter-free fractional division, the system comprising:
a clock having an output to supply a first plurality of first signal phase signals, each phase signal having a first frequency, where neighboring phase by 90 degrees;
a glitch-free multiplexer (MUX) having an input to accept the first plurality of phase signals, a control input to accept a first plurality of phase selection signals, and an output to supply a selected phase signal subsequent to deselecting a previous phase selection;
a divider having an input to accept the selected phase signal, the divider dividing the selected phase signal by the integer N, and supplying a second signal with a second frequency at an output; and,
a counter circuit including a first plurality of serially-connected counters, each counter having a clock input to accept the second signal and an output to supply a count as an input to a subsequent counter and as a corresponding phase selection signal to the glitch-free MUX, the counter circuit including:
a first counter having a signal input, a clock input to accept the second signal, and a first count output triggered in response to the combination of signal and clock inputs;
a second counter having a signal input, a clock input to accept the second signal, and a second count output triggered in response to the combination of signal and clock inputs;
a third counter having a signal input, a clock input to accept the second signal, and a third count output triggered in response to the combination of signal and clock inputs; and,
a fourth counter having a signal input, a clock input to accept the second signal, and a fourth count output, triggered in response to the combination of signal and clock inputs.
7. The system of claim 6 wherein the divider supplies a second frequency selected from a group consisting of (first frequency)(N+0.25), (first frequency)(N+0.5), and (first frequency)(N+0.75).
8. The system of claim 6 wherein the divider supplies a second frequency=(first frequency)(N+0.25);
wherein the glitch-free MUX includes:
a first selector circuit having an input to accept a first phase signal (CLKIN1), an input to accept a first phase selection signal (SELECT1), an input to accept a SELECT_OUT4 signal, an output to supply a SELECT_OUT1 signal in response to a last occurrence of a first phase signal (CLKOUT1), and an output to supply the first phase signal in response to accepting the SELECT_OUT4 signal;
a second selector circuit having an input to accept a second phase signal (CLKIN2), an input to accept a second count phase selection signal (SELECT2), an input to accept the SELECT_OUT1 signal (PRE_SELECT_IN2), an output to supply a SELECT_OUT2 signal in response to the last occurrence of a second phase signal (CLKOUT2), and an output to supply the second phase signal in response to accepting the SELECT_OUT1 signal;
a third selector circuit having an input to accept a third phase signal (CLKIN3), an input to accept a third count phase selection signal (SELECT3), an input to accept the SELECT_OUT2 signal (PRE_SELECT_IN3), an output to supply a SELECT_OUT3 signal in response to last occurrence of a third phase signal (CLKOUT3), and an output to supply the third phase signal in response to accepting the SELECT_OUT2 signal;
a fourth selector circuit having an input to accept a fourth phase signal (CLKIN4), an input to accept a fourth count phase selection signal (SELECT4), an input to accept the SELECT_OUT3 signal (PRE_SELECT_IN4), an output to supply the SELECT_OUT4 signal in response to the last occurrence of a fourth phase signal (CLKOUT4), and an output to supply the fourth phase signal in response to accepting the SELECT_OUT3 signal;
wherein the first selector circuit ceases to supply the first phase signal prior to the second selector circuit beginning to supply the second phase signal;
wherein the second selector circuit ceases to supply the second phase signal prior to the third selector circuit beginning to supply the third phase signal;
wherein the third selector circuit ceases to supply the third phase signal prior to the fourth selector circuit beginning to supply the fourth phase signal; and,
wherein the fourth selector circuit ceases to supply the fourth phase signal prior to the first selector circuit beginning to supply the first phase signal.
9. The system of claim 6 wherein the divider supplies a second frequency=(first frequency)(N+0.75);
wherein the glitch-free MUX includes:
a first selector circuit having an input to accept a first phase signal (CLKIN1), an input to accept a first phase selection signal (SELECT1), an input to accept a SELECT_OUT2 signal, an output to supply a SELECT_OUT1 signal in response to the last occurrence of a first phase signal (CLKOUT1), and an output to supply the first phase signal in response to accepting the SELECT_OUT2 signal;
a fourth selector circuit having an input to accept a fourth phase signal (CLKIN4), an input to accept a fourth count phase selection signal (SELECT4), an input to accept the SELECT_OUT1 signal (PRE_SELECT_IN4), an output to supply the SELECT_OUT4 signal in response to the last occurrence of a fourth phase signal (CLKOUT4), and an output to supply the fourth phase signal in response to accepting the SELECT_OUT1 signal;
a third selector circuit having an input to accept a third phase signal (CLKIN3), an input to accept a third count phase selection signal (SELECT3), an input to accept the SELECT_OUT4 signal (PRE_SELECT_IN3), an output to supply a SELECT_OUT3 signal in response to the last occurrence of a third phase signal (CLKOUT3), and an output to supply the third phase signal in response to accepting the SELECT_OUT4 signal;
a second selector circuit having an input to accept a second phase signal (CLKIN2), an input to accept a second count phase selection signal (SELECT2), an input to accept the SELECT_OUT3 signal (PRE_SELECT_IN2), an output to supply a SELECT_OUT2 signal in response to the last occurrence of a second phase signal (CLKOUT2), and an output to supply the second phase signal in response to accepting the SELECT_OUT3 signal;
wherein the first selector circuit ceases to supply the first phase signal prior to the fourth selector circuit beginning to supply the fourth phase signal;
wherein the fourth selector circuit ceases to supply the fourth phase signal prior to the third selector circuit beginning to supply the third phase signal;
wherein the third selector circuit ceases to supply the third phase signal prior to the second selector circuit beginning to supply the second phase signal; and,
wherein the second selector circuit ceases to supply the second phase signal prior to the first selector circuit beginning to supply the first phase signal.
10. The system of claim 9 further comprising:
a summing circuit including:
a first NAND gate having inputs to accept the first and second phase signals and an output to supply a first NAND signal;
a second NAND gate having inputs to accept the third and fourth phase signals and an output to supply a second NAND signal;
a third NAND gate having inputs to accept the first and second NAND signals and an output to supply the selected phase signal.
11. The system of claim 6 wherein the glitch-free MUX comprises a plurality of selector circuits, each selector circuit including:
a flip-flop (FF) having a signal input to accept a SELECT signal, a clock input to accept a CLKIN signal, and an output to supply a SELECT_OUT signal;
a latch having an input (PRE_SELECT_IN) to accept a SELECT_OUT signal from another selector circuit, a clock input to accept the CLKIN signal, and an output to supply a latch signal; and,
a gate having an input to accept the SELECT_OUT signal from the FF, an input to accept the CLKIN signal, an input to accept the latch signal, and an output to supply the CLKOUT signal in response to the combination of the SELECT_OUT, CLKIN, and latch signals.
12. A system for jitter-free fractional division, the system comprising:
a clock having an output to supply a first plurality of first signal phase signals, each phase signal having a first frequency;
a glitch-free multiplexer (MUX) having an input to accept the first plurality of phase signals, a control input to accept a first plurality of phase selection signals, and an output to supply a selected phase signal subsequent to deselecting a previous phase selection;
a divider having an input to accept the selected phase signal, the divider dividing the selected phase signal by the integer N, and supplying a second signal with a second frequency at an output;
a counter circuit including a first plurality of serially-connected counters, each counter having a clock input to accept the second signal and an output to supply a count as an input to a subsequent counter and as a corresponding phase selection signal to the glitch-free MUX;
wherein the glitch-free MUX comprises a plurality of selector circuits, each selector circuit including:
a flip-flop (FF) having a signal input to accept a SELECT signal, a clock input to accept a CLKIN signal, and an output to supply a SELECT_OUT signal;
a latch having an input (PRE_SELECT_IN) to accept a SELECT_OUT signal from another selector circuit, a clock input to accept the CLKIN signal, and an output to supply a latch signal; and,
a gate having an input to accept the SELECT_OUT signal from the FF, an input to accept the CLKIN signal, an input to accept the latch signal, and an output to supply the CLKOUT signal in response to the combination of the SELECT_OUT, CLKIN, and latch signals.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for performing a function using a phone number in a mobile communication terminal that stores a plurality of phone numbers and includes at least one function key, comprising:
inputting a phone number;
inputting a function key;
inputting the input phone number as a phone number of a message receiver, editing a message, and transmitting the edited message, if the function is a message function;
2. The method of claim 1, wherein editing the message comprises:
displaying a message editing screen in which the input phone number is input as the phone number of the message receiver;
creating the message in the displayed message editing screen; and
transmitting the created message to the phone number of the message receiver.
3. The method of claim 1, further comprising:
selecting a ring sound corresponding to the input phone number, if the function is a ring sound function.
4. The method of claim 3, wherein selecting the ring sound comprises:
displaying a ring sound selection screen for selecting the ring sound corresponding to the input phone number;
selecting a ring sound from among ring sounds displayed on the ring sound selection screen; and
mapping the selected ring sound to the input phone number and storing the selected ring sound mapped to the input phone number such that the selected ring sound is output when a call is received from the input phone number.
5. The method of claim 1, further comprising:
capturing an image corresponding to the input phone number, mapping the captured image to the input phone number, and storing the captured image mapped to the input phone number, if the function is a phone number image storage function.
6. The method of claim 5, wherein storing the image comprises:
activating a camera unit to capture the image corresponding to the input phone number;
capturing the image by means of the camera unit; and
mapping the captured image to the input phone number and storing the captured image mapped to the input phone number.
7. A method for performing a function using a phone number in a mobile communication terminal that stores a plurality of phone numbers and includes at least one function key, comprising:
inputting a phone number;
inputting a function key; and
capturing an image corresponding to the input phone number, mapping the captured image to the input phone number, and storing the captured image mapped to the input phone number, if the function is a phone number image storage function.
8. The method of claim 7, wherein storing the image comprises:
activating a camera unit to capture the image corresponding to the input phone number;
capturing the image by means of the camera unit; and
mapping the captured image to the input phone number and storing the captured image mapped to the input phone number.
9. The method of claim 7, further comprising:
inputting the input phone number as a phone number of a message receiver, editing a message, and transmitting the edited message, if the function is a message function.
10. The method of claim 9, wherein editing the message comprises:
displaying a message editing screen in which the input phone number is input as the phone number of the message receiver;
creating the message in the displayed message editing screen; and
transmitting the created message to the phone number of the message receiver.
11. The method of claim 7, further comprising:
selecting a ring sound corresponding to the input phone number, if the function is a ring sound function.
12. The method of claim 11, wherein selecting the ring sound comprises:
displaying a ring sound selection screen for selecting the ring sound corresponding to the input phone number;
selecting a ring sound from among ring sounds displayed on the ring sound selection screen; and
mapping the selected ring sound to the input phone number and storing the selected ring sound mapped to the input phone number such that the selected ring sound is output when a call is received from the input phone number.
13. A method for performing a function using a phone number in a mobile communication terminal that stores a plurality of phone numbers and includes at least one function key, comprising:
inputting a phone number;
inputting a function key; and
selecting a ring sound corresponding to the input phone number, when the function is a ring sound selection function.
14. The method of claim 13, wherein selecting the ring sound comprises:
displaying a ring sound selection screen for selecting the ring sound corresponding to the input phone number;
selecting a ring sound from among ring sounds displayed on the ring sound selection screen; and
mapping the selected ring sound to the input phone number and storing the selected ring sound mapped to the input phone number such that the selected ring sound is output when a call is received from the input phone number.
15. The method of claim 13, further comprising:
inputting the input phone number as a phone number of a message receiver, editing a message, and transmitting the edited message, if the function is a message function.
16. The method of claim 14, wherein editing the message comprises:
displaying a message editing screen in which the input phone number is input as the phone number of the message receiver;
creating the message in the displayed message editing screen; and
transmitting the created message to the phone number of the message receiver.
17. The method of claim 13, further comprising:
capturing an image corresponding to the input phone number, mapping the captured image to the input phone number, and storing the captured image mapped to the input phone number, if the function is a phone number image storage function.
18. The method of claim 17, wherein storing the image comprises:
activating a camera unit to capture the image corresponding to the input phone number;
capturing the image by means of the camera unit; and
mapping the captured image to the input phone number and storing the captured image mapped to the input phone number.