Texas Instruments Corporation

Christopher Paul Lash

Frederick J Highton

Ronald F Cormier

Aditya Vighnesh Ramakanth Bommireddipalli

A circuit includes a first transistor having a first control input and first and second current terminals, and a second transistor having a second control input and third and fourth current terminals. A third transistor has a third control input and fifth and sixth current terminals, the fifth current terminal coupled to the first current terminal at a first supply voltage node. A fourth transistor has a fourth control input and seventh and eighth current terminals, the seventh current terminal coupled to the second and sixth current terminals. A pulse generator has a pulse generator input and a first pulse generator output, the pulse generator input configured to receive a switch control signal, and the first pulse generator output coupled to the first control input. The third control input is configured to receive either the switch control signal or a logical inverse of the switch control signal.

Fast transient and low power thin-gate based high-voltage switch

A switched-capacitor sample/hold circuit includes a switched-capacitor input sampling stage and a sample/hold amplifier circuit including an operational amplifier having first and second inputs coupled to first and second input sampling capacitors, respectively, and first and second feedback capacitors coupled between the first and second inputs and first and second outputs of the operational amplifier. A continuous-time offset DAC receives a digital input signal representative of an offset voltage produces first and second offset correction voltages. The first and second offset correction voltages are coupled to the switched-capacitor sample/hold circuit to adjust the amount of pre-charging of the first and second feedback capacitors, respectively, in accordance with the value of the digital input signal to compensate an offset component associated with the and second input voltages. The output of the switched-capacitor sample/hold circuit can be connected to an ADC.

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Portland, OR, United States of America

Christopher Paul Lash