1. A sense amplifier comprising:
a pre-charge sub-circuit configured to provide a pre-charge voltage to a sense enable sub-circuit, wherein said pre-charge voltage is a voltage between zero volts and the voltage of a positive power supply node;
said sense enable sub-circuit configured to sense a voltage difference between a pair of bit lines to which the sense enable sub-circuit is coupled, to adjust the received pre-charge voltage based on said voltage difference between the pair of bit lines, and to output the adjusted voltage to a sense output sub-circuit; and
said sense output sub-circuit configured to receive the adjusted voltage via a coupling capacitor and to invert and to amplify said adjusted voltage.
2. The sense amplifier of claim 1 wherein said pre-charge sub-circuit comprises an inverter disposed in parallel with a switch, with both inverter and switch connected to a common node linking said pre-charge sub-circuit with said sense enable sub-circuit and said sense output sub-circuit.
3. The sense amplifier of claim 1 wherein said pre-charge sub-circuit comprises a transistor whose drain and gate is connected to the positive power supply node and whose source is connected to a switch, said switch further connected to a common node coupling said pre-charge sub-circuit to said sense enable sub-circuit and to said sense output sub-circuit.
4. The sense amplifier of claim 3 wherein said transistor is a NMOS-type transistor.
5. The sense amplifier of claim 1 wherein said pre-charge sub-circuit comprises a transistor, an inverter, and a switch, configured such that the transistor drain is connected to the positive power supply node, the transistor source is connected to the input of said inverter and said switch, and the transistor gate is connected to the output of said inverter; the output of said switch is further connected to a common node coupling said pre-charge sub-circuit to said sense enable sub-circuit and to said sense output sub-circuit.
6. The sense amplifier of claim 5 wherein said transistor is a NMOS-type transistor.
7. The sense amplifier of claim 1 wherein said sense enable sub-circuit comprises a first transistor of a first type, and a first transistor of a second type, the first transistor of the first type configured such that its source is connected to the positive power supply node, its gate is connected to an inverse sense enable line, and its drain is connected to a common node coupling said sense enable sub-circuit to said pre-charge sub-circuit and to said sense output sub-circuit; the first transistor of the second type configured such that its drain is connected to said common node, its gate is connected to a sense enable line, and its source is coupled to ground.
8. The sense amplifier of claim 1 wherein said sense output sub-circuit comprises an inverter, a switch, and the coupling capacitor, configured such that the coupling capacitor is disposed in series between said sense enable sub-circuit and said inverter, and said inverter is disposed in parallel with said switch.
9. A sense amplifier comprising:
a pre-charge sub-circuit for providing a pre-charge voltage to a sense enable sub-circuit, wherein said pre-charge voltage is a voltage between zero volts and the voltage of a positive power supply node;
said sense enable sub-circuit for reading bit lines values, adjusting the received pre-charge voltage based on said bit line values, and sending the adjusted voltage to a sense output sub-circuit;
said sense output sub-circuit for inverting and amplifying said adjusted voltage; and
a capacitor providing capacitive coupling between said sense enable sub-circuit and said sense output sub-circuit.
10. The sense amplifier of claim 9 wherein said pre-charge sub-circuit comprises an inverter disposed in parallel with a switch, with both inverter and switch connected to a common node linking said pre-charge sub-circuit with said sense enable sub-circuit and said sense output sub-circuit.
11. The sense amplifier of claim 9 wherein said pre-charge sub-circuit comprises a transistor whose drain and gate is connected to the positive power supply node and whose source is connected to a switch, said switch further connected to a common node coupling said pre-charge sub-circuit to said sense enable sub-circuit and to said sense output sub-circuit.
12. The sense amplifier of claim 11 wherein said transistor is a NMOS-type transistor.
13. The sense amplifier of claim 9 wherein said pre-charge sub-circuit comprises a transistor, an inverter, and a switch, configured such that the transistor drain is connected to the positive power supply node, the transistor source is connected to the input of said inverter and said switch, and the transistor gate is connected to the output of said inverter; the output of said switch is further connected to a common node coupling said pre-charge sub-circuit to said sense enable sub-circuit and to said sense output sub-circuit.
14. The sense amplifier of claim 13 wherein said transistor is a NMOS-type transistor.
15. The sense amplifier of claim 9 wherein said sense enable sub-circuit comprises a first transistor of a first type, a first transistor of a second type, and a capacitor, the first transistor of the first type configured such that its source is connected to the positive power supply node, its gate is connected to an inverse sense enable line, and its drain is connected to a common node coupling said sense enable sub-circuit to said pre-charge sub-circuit and to said sense output sub-circuit; the first transistor of the second type configured such that its drain is connected to said common node, its gate is connected to a sense enable line, and its source is coupled to ground; and said capacitor is disposed in parallel with said first transistor of the second type.
16. The sense amplifier of claim 9 wherein said sense output sub-circuit comprises an inverter, a switch, the coupling capacitor, and second and third capacitors, configured such that the coupling capacitor is disposed in series between said sense enable sub-circuit and said inverter, said inverter is disposed in parallel with said switch, and the second and third capacitor are connected to the input and output of the inverter, respectively.
17. A method comprising:
providing a pre-charge voltage from a pre-charge sub-circuit to a sense enable sub-circuit, wherein said pre-charge voltage is a voltage between zero volts and the voltage of a positive power supply node;
raising or lowering the received pre-charge voltage at said sense enable sub-circuit based on bit line values sensed at said sense enable sub-circuit;
providing the adjusted voltage to a sense output sub-circuit; and
inverting and amplifying said adjusted voltage at said sense output sub-circuit.
18. The method of claim 17 where the inverted and amplified voltage of said sense output sub-circuit is buffered and provided to the output bus.
19. A sense amplifier comprising:
a pre-charge sub-circuit configured to provide a pre-charge voltage to a sense enable sub-circuit, wherein said pre-charge sub-circuit comprises an inverter disposed in parallel with a switch, with both inverter and switch connected to a common node linking said pre-charge sub-circuit with said sense enable sub-circuit and said sense output sub-circuit;
said sense enable sub-circuit configured to sense a voltage difference between a pair of bit lines to which the sense enable sub-circuit is coupled, to adjust the received pre-charge voltage based on said voltage difference between the pair of bit lines, and to output the adjusted voltage to a sense output sub-circuit; and
said sense output sub-circuit configured to receive the adjusted voltage via a coupling capacitor and to invert and to amplify said adjusted voltage.
20. A sense amplifier comprising:
a pre-charge sub-circuit configured to provide a pre-charge voltage to a sense enable sub-circuit;
said sense enable sub-circuit configured to sense a voltage difference between a pair of bit lines to which the sense enable sub-circuit is coupled, to adjust the received pre-charge voltage based on said voltage difference between the pair of bit lines, and to output the adjusted voltage to a sense output sub-circuit, wherein said sense enable sub-circuit comprises a first transistor of a first type, and a first transistor of a second type, the first transistor of the first type configured such that its source is connected to a positive power supply node, its gate is connected to an inverse sense enable line, and its drain is connected to a common node coupling said sense enable sub-circuit to said pre-charge sub-circuit and to said sense output sub-circuit;
the first transistor of the second type configured such that its drain is connected to said common node, its gate is connected to a sense enable line, and its source is coupled to ground; and
said sense output sub-circuit configured to receive the adjusted voltage via a coupling capacitor and to invert and to amplify said adjusted voltage.
21. A sense amplifier comprising:
a pre-charge sub-circuit configured to provide a pre-charge voltage to a sense enable sub-circuit;
said sense enable sub-circuit configured to sense a voltage difference between a pair of bit lines to which the sense enable sub-circuit is coupled, to adjust the received pre-charge voltage based on said voltage difference between the pair of bit lines, and to output the adjusted voltage to a sense output sub-circuit; and
said sense output sub-circuit configured to receive the adjusted voltage via a coupling capacitor and to invert and to amplify said adjusted voltage, wherein said sense output sub-circuit comprises an inverter, a switch, and the coupling capacitor, configured such that the coupling capacitor is disposed in series between said sense enable sub-circuit and said inverter, and said inverter is disposed in parallel with said switch.
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 knockdown pump containment assembly adapted for communication with a stator having a rotor disposed therein, the pump containment assembly comprising:
a pump housing defining a containment chamber for receiving, containing and directing the flow of a liquid material, the pump housing having an inlet port disposed for directing a flow of liquid material into the containment chamber, and an exit port for directing a flow of liquid material out of the containment chamber, into a stator, wherein the containment chamber of the pump housing is adapted to receive a drive shaft assembly therein;
a pump housing base for releasably receiving and supporting the pump housing;
a pump housing retainer releasably engagable with the pump housing base to releasably secure the pump housing to the pump housing base; and
the pump housing base further comprising a coupling seat, and a base frame that extends outward from the coupling seat, to a retainer mounting portion thereof that receives and releasably fixes the pump housing retainer to the pump housing base so that the pump housing is releasably secured to the pump housing base between the coupling seat and the pump housing retainer.
2. A pump containment assembly as recited in claim 1 further comprising means for fixing the alignment of the pump housing within the pump housing base.
3. A pump containment assembly as recited in claim 1 wherein the base frame defines a receiving slot extending along the base frame between the coupling seat and the retainer mounting portion for receiving the pump housing, and
wherein the pump housing is formed to mate within the receiving slot of the base frame so that the pump housing alignment with the pump housing base is fixed, and relative rotational movement is restricted.
4. A pump containment assembly as recited in claim 3 wherein the pump housing retainer is formed to mate within the receiving slot of the base frame so that the alignment of the pump housing retainer with the pump housing base, and the pump housing is fixed.
5. A pump containment assembly as recited in claim 4 wherein the receiving slot of the base frame is defined by a circular bottom portion disposed between a first step and a second step that extends along the base frame between the coupling seat and the retainer mounting portion.
6. A pump containment assembly as recited in claim 5 wherein the pump housing is formed to define a circular housing portion disposed between a first lip and a second lip, wherein the first lip is disposed for sliding engagement with the first step of the base frame, and the second lip is disposed for sliding engagement with the second step of the base frame, wherein relative rotational movement between the pump housing and the pump housing base is restricted so that their relative alignment is fixed.
7. A pump containment assembly as recited in claim 5 wherein the pump housing retainer is formed to define spaced apart retainer lips disposed to respectively engage the first and second steps of the base frame to restrict relative rotational movement between the pump housing retainer and the pump housing base so that their relative alignment is fixed.
8. A pump containment assembly as recited in claim 1 wherein the pump housing base is adapted to engage a drive mechanism that delivers a rotational driving force to a drive shaft assembly disposed within the containment chamber between a stator and the pump housing base.
9. A pump containment assembly as recited in claim 1 wherein wherein the pump housing further comprises a drive shaft aperture adapted to receive a drive shaft assembly therethrough.
10. A pump containment assembly as recited in claim 1 wherein the pump housing retainer comprises a threaded bore for threadedly engaging a stator.
11. A pump containment assembly as recited in claim 1 wherein at least one lever cam loc is disposed on the retainer mounting portion for engagement with the pump housing retainer to releasably fix the pump housing retainer to the pump housing base so that the pump housing is releasably secured to the pump housing base between the coupling seat and the pump housing retainer.
12. A method for making knockdown pump containment assembly adapted for communication with a stator having a rotor disposed therein, the method comprising the steps:
forming a pump housing that defines a containment chamber for receiving, containing and directing the flow of a liquid material, the pump housing having an inlet port disposed for directing a flow of liquid material into the containment chamber, and an exit port for directing a flow of liquid material out of the containment chamber, into a stator, wherein the containment chamber of the pump housing is adapted to receive a drive shaft assembly therein;
providing a pump housing base for releasably receiving and supporting the pump housing;
providing a pump housing retainer releasably engagable with the pump housing base to releasably secure the pump housing to the pump housing base; and
wherein the step of providing a pump housing base further comprises the steps of forming a coupling seat, and a base frame that extends outward from the coupling seat to a retainer mounting portion formed to receive and releasably fix the pump housing retainer to the pump housing base so that the pump housing is releasably secured to the pump housing base between the coupling seat and the pump housing retainer.
13. A method of making a pump containment assembly as recited in claim 1 further comprising the step of providing means for fixing the alignment of the pump housing within the pump housing base.
14. A method of making a pump containment assembly as recited in claim 13 wherein the step of forming a base frame further comprises the step of forming a receiving slot extending along the base frame between the coupling seat and the retainer mounting portion for receiving the pump housing, and
wherein the pump housing is formed to mate within the receiving slot of the base frame so that the pump housing alignment with the pump housing base is fixed, and relative rotational movement is restricted.
15. A method of making a pump containment assembly as recited in claim 14 wherein the pump housing retainer is formed to mate within the receiving slot of the base frame so that the alignment of the pump housing retainer with the pump housing base, and the pump housing is fixed.
16. A knockdown pump containment assembly adapted for communication with a stator having a rotor disposed therein, the pump containment assembly comprising:
a pump housing defining a containment chamber for receiving, containing and directing the flow of a liquid material, the pump housing having an inlet port disposed for directing a flow of liquid material into the containment chamber, and an exit port for directing a flow of liquid material out of the containment chamber, into a stator, wherein the containment chamber of the pump housing is adapted to receive a drive shaft assembly therein;
a pump housing base for releasably receiving and supporting the pump housing;
a pump housing retainer releasably engagable with the pump housing base to releasably secure the pump housing to the pump housing base;
the pump housing base further comprising a coupling seat, and a base frame that extends outward from the coupling seat, to a retainer mounting portion thereof that receives and releasably fixes the pump housing retainer to the pump housing base so that the pump housing is releasably secured to the pump housing base between the coupling seat and the pump housing retainer;
means for fixing the alignment of the pump housing within the pump housing base; and
wherein the pump housing further comprises a drive shaft aperture adapted to receive a drive shaft assembly therethrough.
17. A pump containment assembly as recited in claim 16 wherein the pump housing retainer comprises a threaded bore for threadedly engaging a stator.
18. A pump containment assembly as recited in claim 16 wherein a lever cam loc disposed on the retainer mounting portion engages the pump housing retainer to releasably fixe the pump housing retainer to the pump housing base so that the pump housing is releasably secured to the pump housing base between the coupling seat and the pump housing retainer.
19. A pump containment assembly as recited in claim 18 wherein the drive shaft aperture forms a seal with the coupling seat of the pump housing base.
20. A pump containment assembly as recited in claim 16 wherein the inlet port of the containment chamber defines a threaded bore for threadedly engaging a liquid supply hopper.
21. A pump containment assembly as recited in claim 16 wherein the pump housing retainer includes a retainer lug for engagement with a stator to prevent rotation of the stator in relation to the pump housing retainer.
inlet port of the containment chamber defines a threaded bore for threadedly engaging a liquid supply hopper.