An operational amplifier with totem pole connected output transistors having inputs coupled to multiplexers for selectable coupling of signals and voltage levels thereto. The high and low output transistors may be forced hard on or hard off in addition to normal coupling of signals thereto. The operation of the output transistors may be dynamically changed to pass only positive going signals, negative going signals, placed in a tristate high impedance state, hard connected to a supply voltage and/or hard connected to supply common return. A core independent peripheral (CIP) may also be coupled to the operational amplifier for dynamically changing the multiplexer inputs in real time, as can external control signals to a control circuit coupled to the multiplexers.

Differential sampling circuits may be adversely affected by changes in common mode voltage. Changes in the common mode voltage may alter the on resistance of transistor switches which it turn may mean that small signal changes are not correctly observed against a bigger common mode signal. The present disclosure relates to a way of improving the ability to resolve small differential signal changes by varying the supply or drive voltage to a component to compensate for common mode voltage changes.

A driver circuit is provided. The driver circuit includes a first operational amplifier circuit, a second operational amplifier circuit, and at least one power switching circuit is provided. The first operational amplifier circuit receives a first input signal and generates a first output signal according to the first input signal. The second operational amplifier circuit receives a second input signal and generates a second output signal according to the second input signal. The at least one power switching circuit is configured to be coupled to switch a first input stage circuit to one of a first output stage circuit and a second output stage circuit, and the at least one power switching circuit is further coupled to switch a second input stage circuit to the other one of the first output stage circuit and the second output stage circuit.

A driver circuit is provided. The driver circuit includes a first operational amplifier circuit, a second operational amplifier circuit, and at least one power switching circuit is provided. The first operational amplifier circuit receives a first input signal and generates a first output signal according to the first input signal. The second operational amplifier circuit receives a second input signal and generates a second output signal according to the second input signal. The at least one power switching circuit is configured to be coupled to switch a first input stage circuit to one of a first output stage circuit and a second output stage circuit, and the at least one power switching circuit is further coupled to switch a second input stage circuit to the other one of the first output stage circuit and the second output stage circuit.

An operational amplifier with totem pole connected output transistors having inputs coupled to multiplexers for selectable coupling of signals and voltage levels thereto. The high and low output transistors may be forced hard on or hard off in addition to normal coupling of signals thereto. The operation of the output transistors may be dynamically changed to pass only positive going signals, negative going signals, placed in a tristate high impedance state, hard connected to a supply voltage and/or hard connected to supply common return. A core independent peripheral (CIP) may also be coupled to the operational amplifier for dynamically changing the multiplexer inputs in real time, as can external control signals to a control circuit coupled to the multiplexers.

A driver circuit includes a first operational amplifier circuit, a second operational amplifier circuit, and at least one power switching circuit is provided. The first operational amplifier circuit receives a first input signal and generates a first output signal according to the first input signal. The second operational amplifier circuit receives a second input signal and generates a second output signal according to the second input signal. The at least one power switching circuit is coupled to the first operational amplifier circuit and the second operational amplifier circuit, and configured to switch at least one power supply for both the first operational amplifier circuit and the second operational amplifier circuit.

Circuitry for voltage-to-current conversion, and in particular to differential voltage-to-current conversion circuitry. Such circuitry is operable to receive a differential voltage input signal and output a corresponding differential current signal. First and second controllable current sinks are connected to first and second load nodes of the circuitry so as to draw corresponding sink currents from those nodes.

A driver circuit includes a first operational amplifier circuit, a second operational amplifier circuit, and at least one power switching circuit is provided. The first operational amplifier circuit receives a first input signal and generates a first output signal according to the first input signal. The second operational amplifier circuit receives a second input signal and generates a second output signal according to the second input signal. The at least one power switching circuit is coupled to the first operational amplifier circuit and the second operational amplifier circuit, and configured to switch at least one power supply for both the first operational amplifier circuit and the second operational amplifier circuit.

The present invention relates to circuitry for voltage-to-current conversion, and in particular to differential voltage-to-current conversion circuitry. Such circuitry is operable to receive a differential voltage input signal and output a corresponding differential current signal.

A driver circuit including a first op-amp, a second op-amp, and a power switching circuit is provided. The first op-amp includes a first input stage circuit for generating a first amplified signal and a first output stage circuit. The second op-amp includes a second input stage circuit for generating a second amplified signal and a second output stage circuit. The power switching circuit includes a first output terminal for outputting one of the first amplified signal and the second amplified signal and a second output terminal for outputting the other of the first amplified signal and the second amplified signal. The power switching circuit is configured to switch a first power supply for both the first input stage circuit and the second input stage circuit between a first supply voltage and a second supply voltage in response to the control signal.