Feedback controlled load logic circuit
AssigneeFujitsu Microelectronics Limited
InventorHuy S. Nguyen
Life of this patent
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Abstract
A logic circuit employing feedback controlled loads to increase the response time and minimize power consumption. A plurality of input circuits are provided, each having means for coupling a first signal to a second signal. A first load responsive to the second signal provides a means for pulling up the first signal and a second load responsive to the first signal provides a means for pulling down the second signal. A driver responsive to the first and second signals is provided for generating an output voltage.
Claims20
A controlled logic circuit comprising:
- a driving circuit comprising first and second inputs and for producing an output responsive to signals at said first and second inputs;
- a logic control circuit comprising at least one input switching circuit coupled between the first and second inputs;
- a first controllable conductance circuit for coupling the first input to a signal potential and comprising a control input coupled to the second input;
- and
- a second controllable conductance circuit for coupling the second input to another signal potential and comprising a control input coupled to the first input.
A feedback controlled load logic circuit responsive to an input voltage, said input voltage having a high level voltage and a low level voltage, comprising:
- an input circuit for coupling a first signal to a second signal in response to one of said high level voltage and said low level voltage;
- a first load coupled between the first signal and a power source, said first load having a conductance corresponding to a voltage of said second signal;
- a second load coupled between the second signal and a power source return, said second load having a conductance corresponding to a voltage of said first signal;
- and
- a driver for generating an output voltage as a function of the first and second signals.
A feedback controlled load logic circuit coupled between a voltage source and a voltage source return, comprising:
- generating means for generating a first and a second signal in response to an input voltage;
- first limiting means for limiting a voltage swing of the first signal substantially between the voltage source and a voltage level in response to said second signal;
- second limiting means for limiting a voltage swing of the second signal substantially between the voltage source return and said voltage level in response to said first signal;
- and
- a driver having an output responsive to said first and second signals, said output having a voltage swing substantially between the voltage source and the voltage source return.
Dependencies are inferred from the claim text.