Power reduction in a temperature compensating transistor circuit
AssigneeTexas Insturments Incorporated
InventorTheodore W. Houston
Life of this patent
Estimating the term…
Abstract
A circuit for providing parameter compensation to a drive transistor of logic circuit A. A regulating transistor circuit B is connected in series with the drive transistor in order to limit the current in the drive transistor. Bias circuitry C is also provided for supplying a bias voltage Vb to a gate of the regulating transistor circuit B, wherein the voltage is responsive to a predetermined parameter. The bias circuitry C comprises an element which is sensitive to the predetermined parameter.
Claims29
A circuit including a pre-inverter input signal and an inverter having an input, an output, and a drive transistor, said circuit comprising:
- a regulating transistor connected in series with said drive transistor for limiting current in said drive transistor, said regulating transistor and said drive transistor being connected in series between a supply voltage and said output node with said regulating transistor connected between said drive transistor and said supply voltage;
- and
- control circuitry connected to said pre-inverter input signal for supplying a voltage to a gate of said regulating transistor responsive to a predetermined current varying parameter, said control circuitry comprising an element sensitive to said predetermined current varying parameter.
A delay circuit having first and second drive transistors each connected to and for supplying current to a node, comprising:
- first and second regulating transistors connected in series with said first and second drive transistors, respectively, for limiting current in said first and second drive transistors;
- rise time control circuitry connected to a gate of said first regulating transistor and for supplying a first voltage to said gate of said first regulating transistor responsive to a predetermined parameter, said rise time control circuitry comprising a first element sensitive to said predetermined parameter;
- and
- fall time control circuitry connected to a gate of said second regulating transistor and for supplying a first voltage to said gate of said second regulating transistor responsive to said predetermined parameter, said fall time control circuitry comprising a second element sensitive to said predetermined parameter.
An integrated circuit comprising:
- a control circuit comprising an element sensitive to a predetermined parameter, said control circuit having a control circuit output;
- a logic gate, said logic gate comprising:
- an input;
- an output;
- a first drive transistor connected between said output and a first supply voltage and having a gate connected to said input;
- and
- a second drive transistor connected between said output and a second supply voltage and having a gate connected to said input;
- and
- a regulating transistor connected in series with said first drive transistor between said drive transistor and said first supply voltage and having a gate connected to said control circuit output.
A system for regulating the performance of a logic gate as a function of at least one current varying parameter, said system comprising:
- said logic gate which comprises:
- an input;
- an output;
- and
- a drive transistor connected to said output;
- a regulating transistor connected in series with said drive transistor between said drive transistor and a supply voltage;
- and
- a bias circuit sensitive to said at least one current varying parameter, said bias circuit connected to a gate of said regulating transistor.
An integrated circuit comprising:
- a control circuit comprising at least one diode sensitive to a predetermined parameter, said control circuit having a control circuit output;
- a logic gate, said logic gate comprising:
- an input;
- an output;
- a first drive transistor connected between said output and a first supply voltage and having a gate connected to said input;
- and
- a second drive transistor connected between said output and a second supply voltage and having a gate connected to said input;
- and
- a regulating transistor connected in series with said first drive transistor and having a gate connected to said control circuit output.
An integrated circuit comprising:
- a control circuit comprising a polysilicon resistor sensitive to a predetermined parameter, said control circuit having a control circuit output;
- a logic gate, said logic gate comprising:
- an input;
- an output;
- a first drive transistor connected between said output and a first supply voltage and having a gate connected to said input;
- and
- a second drive transistor connected between said output and a second supply voltage and having a gate connected to said input;
- and
- a regulating transistor connected in series with said first drive transistor and having a gate connected to said control circuit output.
Dependencies are inferred from the claim text.