Telcom Semiconductor, Inc.

Zhong H Mo

Brian Gillings

An integrated circuit providing two output functions from a single output controlled by an input with a single switch responsive to an input level.

Circuit having an input terminal for controlling two functions

An integrating circuit includes first and second amplifiers for use during a zero-integrate mode and a X10 mode, respectively. The first amplifier is a low gain amplifier to ensure stability, whereas the second amplifier is a high gain amplifier to improve accuracy. During the zero-integrate mode, switches couple an integrator input lead to the first amplifier output lead and decouple it from the second amplifier output lead. During the X10 mode, the switches decouple the integrator input lead from the first amplifier output lead and couple it to the second amplifier output lead.

Integrator system with variable gain feedback

A buffer circuit having both high gain and high slew rate is implemented using a high gain-low slew rate amplifier and a switch network. The buffer circuit's operation is divided into three periods. During the first period, the output of the amplifier is isolated from the load to allow the amplifier's output voltage to more quickly reaches its final voltage level. During the second period, the switch network couples the amplifier output lead to the load input lead where the amplifier drives the voltage at the load's input lead to a voltage substantially equal to the voltage of the input signal. During the third period, the switch network isolates the amplifier from the load and couples the load's input lead to a source of ground potential to quickly slew the load's input lead to ground potential.

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Daly City, CA, United States of America

Zhong H Mo