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US 5,508,640 AGranted
Dynamic CMOS logic circuit with precharge
AssigneeIntergraph Corporation
InventorsHamid Partovi, Donald A. Draper
Life of this patent
Estimating the term…
Abstract
A first transistor is connected to a second transistor so that the first and second transistors may be initially biased in a non-conducting state when a first node is at a first voltage potential and a second node is at a second voltage potential. A potential altering circuit selectively alters the voltage potential at the first and second nodes, causes the first and second transistors to be in a conducting state for accelerating a voltage transistion at the first and second nodes toward final values, and maintains the first and second nodes at their final voltage potentials for implementing a desired Boolean function.
Claims23
An electronic circuit comprising:
- first and second transistors initially biased in a nonconducting state when a first node, coupled to a second transistor, is at a first voltage potential and a second node, coupled to a first transistor, is at a second voltage potential, the first voltage potential being different from the second voltage potential;
- and
- altering means, coupled to the first and second nodes and responsive to at least a first control signal, for altering the first and second voltage potentials at the first and second nodes, respectively, and for causing the first and second transistors to be in a conducting state and for accelerating the voltage change at the first and second nodes to final voltage potentials;
- wherein the first transistor has a first current flowing terminal coupled to a third voltage potential and a second current terminal coupled to the first node;
- wherein the second transistor has a first current flowing terminal coupled to a fourth voltage potential and a second current flowing terminal coupled to the second node;
- and
- wherein the third voltage potential is different from the fourth voltage potential.
4 more elements
An electronic circuit comprising:
- a first switching element having a first signal terminal and a control terminal;
- wherein first switching element signals appear at the first signal terminal of the first switching element in response to signals applied to the control terminal there;
- a second switching element having a first signal terminal and a control terminal;
- wherein second switching element signals appear at the first signal terminal of the second switching element in response to signals applied to the control terminal thereof;
- wherein the control terminal of the first switching element is coupled to the first signal terminal of the second switching element;
- wherein the control terminal of the second switching element is coupled to the first signal terminal of the first switching element;
- initializing means, coupled to a first selected one of the first signal terminal of the first switching element or the first signal terminal of the second switching element, for initializing the first selected first signal terminal to an initialized signal level;
- and
- signal altering means, coupled to a second selected one of the first signal terminal of the first switching element or the first signal terminal of the second switching element, for altering the signal at the second selected first signal terminal;
- wherein the first switching element includes a second signal terminal coupled to a first signal level;
- wherein the second switching element includes a second signal terminal coupled to a second signal level;
- wherein the first signal level is different from the second signal level;
- wherein the first switching element communicates current between the first signal terminal and the second signal terminal thereof in response to signals applied to the control terminal thereof;
- and
- wherein the second switching element communicates current between the first signal terminal and the second signal terminal thereof in response to signals applied to the control terminal thereof.
12 more elements
An electronic circuit comprising:
- a first switching element having a first signal terminal and a control terminal;
- wherein first switching element signals appear at the first signal terminal of the first switching element in response to signals applied to the control terminal of the first switching element;
- a second switching element having a first signal terminal and a control terminal;
- wherein second switching element signals appear at the first signal terminal of the second switching element in response to signals applied to the control terminal of the second switching element;
- wherein the control terminal of the first switching element is coupled to the first signal terminal of the second switching element;
- wherein the control terminal of the second switching element is coupled to the first signal terminal of the first switching element;
- initializing means, coupled to the first signal terminal of the first switching element and to the first signal terminal of the second switching element, for initializing the first selected first signal terminal of the first switching element to a first signal level and for initializing the first signal terminal of the second switching element to a second signal level;
- and
- signal altering means, coupled to the first signal terminal of the first switching element and to the first signal terminal of the second switching element, for altering the signal at the first signal terminal of the first switching element and for altering the signal at the first signal terminal of the second switching element;
- wherein the first switching element includes a second signal terminal coupled to a third signal level;
- wherein the second switching element includes a second signal terminal coupled to a fourth signal level;
- wherein the third signal level is different from the fourth signal level;
- wherein the first switching element communicates current between the first signal terminal and the second signal terminal thereof in response to signals applied to the control terminal thereof;
- and
- wherein the second switching element communicates current between the first signal terminal and the second signal terminal thereof in response to signals applied to the control terminal thereof.
12 more elements
An electronic circuit comprising:
- a first transistor having a first current flowing terminal coupled to a first voltage potential and a second current flowing terminal coupled to a first node;
- a second transistor having a first current flowing terminal coupled to a second voltage potential and a second current flowing terminal coupled to a second node;
- biasing means, coupled to the first and second transistors at the first and second nodes, for initially biasing the first and second transistors in a nonconductive state;
- potential altering means, coupled to the first and second node, for altering the voltage potential at the first and second node, respectively;
- and
- wherein the second transistor is coupled to the first node so that the second transistor turns on when the voltage potential is altered at the first node;
- wherein the first voltage potential is a high voltage potential, and wherein the biasing means initializes the first node to a low voltage potential.
4 more elements
Dependencies are inferred from the claim text.