1. An electrical connector adapted for mating with a mating connector, comprising:
a base member having a base frame, a mating frame formed at a front end of the base frame, and an engaging opening defined in upper walls of the base frame and the mating frame;
a cover member having a rib at a front end thereof and a protrusion extending forwardly from the rib; and
a terminal holder assembled between the base member and the cover member and comprising an insulative housing, a plurality of terminals received in the housing and a tongue board extending forwardly from the housing into the mating frame;
wherein the protrusion of the cover member fills the engaging opening of the base member, the mating frame and the protrusion together form a mating interface with the tongue board received therein for accommodating insertion of the mating connector, and when the mating connector is inserted into the electrical connector, the mating interface elastically expands in a lateral direction.
2. The electrical connector as described in claim 1, wherein the protrusion of the cover member is formed with a forward portion, a rear portion adjacent to the rib and a middle portion connecting the forward portion and the rear portion.
3. The electrical connector as described in claim 2, wherein the forward portion of the protrusion is thinner than the middle portion.
4. The electrical connector as described in claim 2, wherein the forward portion of the protrusion and the mating frame of the base member have equal thickness.
5. The electrical connector as described in claim 2, wherein the middle portion of the protrusion and the base frame of the base member have equal thickness.
6. The electrical connector as described in claim 2, wherein the terminal holder has a recess at the top thereof for accommodating the rear portion of the protrusion.
7. The electrical connector as described in claim 1, wherein the mating interface has a trapezoidal configuration.
8. The electrical connector as described in claim 1, wherein the base member comprises a pair of engaging ears extending laterally from opposite top sides thereof.
9. The electrical connector as described in claim 8, wherein the cover member comprises a pair of projections extending forwardly from opposite lateral sides thereof, the projections being positioned below the corresponding engaging ears.
10. The electrical connector as described in claim 1, further comprising a pull tab assembled between the base member and the cover member, and a pair of latch springs assembled on the pull tab.
11. An electrical connector comprising:
a horizontal base member and a horizontal cover member complementarily assembled to each other and commonly define an internal space;
an uprightly extending base frame formed on a front portion of the base member, said base frame defining a complete circumference except an engaging opening formed thereof around the cover member;
a terminal holder snugly received in said circumference;
a plurality of terminals disposed in said terminal holder with forwardly extending mating portions for mating with a complementary connector and tail portions for electrically connecting to a cable; and
a protrusion formed on a front portion of the cover member and snugly received in said engaging opening so as to cooperate with said base frame to form the complete circumference.
12. The connector as described in claim 11, wherein said terminal holder further defines a recess in vertical alignment with said engaging opening.
13. The connector as described in claim 12, wherein a lower portion of said protrusion is received in said recess, and an upper portion of said protrusion is received in said engaging opening.
14. The connector as described in claim 11, wherein a mating frame extends forwardly from said base frame with a D-shaped periphery.
15. The connector as described in claim 14, wherein said engaging opening extends forwardly through said mating frame and form a cutout in said periphery.
16. The connector as described in claim 15, wherein said protrusion extends forwardly to occupy said cutout.
17. An electrical connector comprising:
a horizontal base member and a horizontal cover member complementarily assembled to each other and commonly define an internal space;
an uprightly extending base frame formed on a front portion of the base member;
a mating frame forwardly extending from said base frame and defining a mating port thereof;
an engaging opening interrupting a periphery of said mating frame in a front-to-back direction;
a terminal holder snugly received in said base frame;
a plurality of terminals disposed in said terminal holder with forwardly extending mating portions for mating with a complementary connector and tail portions for electrically connecting to a cable; and
a protrusion formed on a front portion of the cover member and snugly received in said engaging opening so as to cooperate with said mating frame to define a complete periphery of said mating port.
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. An xDSL multistandard driver circuit for amplifying an xDSL signal which is applied to an input of said xDSL multistandard driver circuit; said xDSL multistandard driver circuit being configured to be adjusted to different xDSL settings of different xDSL standards according to an operating mode control signal and comprising:
an operational amplifier configured to amplify said xDSL signal applied to said xDSL multistandard driver circuit; said operational amplifier being powered by a variable voltage supply
a signal monitoring circuit which is activated by said operating mode control signal; said signal monitoring circuit being configured, when activated by said operating mode control signal, to generate a control signal to adjust the voltage of said variable voltage supply in order to adjust the maximal signal swing of the output signal of said operational amplifier; said control signal being generated by comparing the amplitude of said xDSL signal with an amplitude threshold value,
wherein a signal gain for amplifying said xDSL signal is adjusted on the basis of an operating mode of said operating mode control signal.
2. The circuit of claim 1, comprising a first resistor, a second resistor and a first switching device which is controlled by said operating mode control signal; said switching device being configured to connect the first resistor or the second resistor between the output and the input of said operational amplifier dependent on said operating mode control signal to adjust said gain of said operational amplifier.
3. The circuit of claim 1, wherein said control signal adjusts the voltage of said variable voltage supply to a higher voltage value, if said amplitude of said xDSL signal applied to said xDSL multistandard driver circuit exceeds the amplitude threshold value.
4. The circuit of claim 1, wherein said monitoring circuit comprises a comparator.
5. The circuit of claim 1, wherein said input of said xDSL multistandard driver circuit is connected via at least one first capacitor to an input of said signal monitoring circuit.
6. The circuit of claim 5, wherein said xDSL multistandard driver circuit comprises a third resistor being connected between said first capacitor and said input of said operational amplifier.
7. The circuit of claim 1, wherein said amplitude threshold value is adjustable.
8. The circuit of claim 1, wherein said xDSL multistandard driver circuit comprises a fourth resistor being connected to an output of said operational amplifier and to primary windings of a transformer.
9. The circuit of claim 8, wherein said transformer has secondary windings which are connected in series which a second capacitor.
10. The circuit of claim 9, wherein said second capacitor is connected to a signal output of said xDSL multistandard driver circuit.
11. The circuit of claim 1, wherein said xDSL multistandard driver circuit comprises a second switching device being controlled by said control signal to adjust the voltage of said variable voltage supply.
12. The circuit of claim 2, wherein the resistances of the first resistor and the second resistor are programmable.
13. The circuit of claim 8, wherein said fourth resistor is fed back to said input of said operational amplifier via a fifth resistor in order to produce a synthesized output impedance.
14. The circuit of claim 1, wherein said operational amplifier is a class G power amplifier.
15. The circuit of claim 1, wherein said xDSL multistandard driver circuit is of fully differential design.
16. The circuit of claim 1, further comprising a control circuit which generates said operating mode control signal; said control circuit being configured to determine the appropriate xDSL of said applied xDSL signal based on a training signal sequence.
17. The circuit of claim 1, wherein said xDSL settings are at least two out of the group of xDSL settings consisting of an ADSL, a VDSL, a SHDSL, and an HDSL standard setting.
18. A multistandard driver circuit for amplifying a signal which is applied to an input of said multistandard driver circuit; said multistandard driver circuit being configured to be adjusted to different settings of different standards according to an operating mode control signal and comprising:
an operational amplifier configured to amplify said signal applied to said multistandard driver circuit; said operational amplifier being powered by a variable voltage supply;
a signal monitoring circuit which is activated by said operating mode control signal; said signal monitoring circuit being configured, when activated by said operating mode control signal, to generate a control signal to adjust the voltage of said variable voltage supply; said control signal being generated by comparing the amplitude of said signal with an amplitude threshold value,
wherein a signal gain for amplifying said signal is adjusted on the basis of an operating mode of said operating mode control signal.
19. The circuit of claim 18, wherein said operational amplifier has a gain being adjustable by said operating mode control signal.