Motorola Corporation

Freescale Semiconductor,inc.

Chunhe Zhao

Douglas Alan Garrity

Kiyoshi Kase

Joseph Y Chan

A switch is provided. The circuit includes a plurality of transistors configured to electrically isolate the input of the switch from the output of the switch. In one embodiment, for example, the plurality of transistors may be configured to provide at least one path between the input and the output of the switch, and to provide at least three layers of electrical isolation between the input and the output of the switch when the switch is open.

High isolation switch

An operational amplifier circuit ( ) uses a first operational amplifier ( ) to selectively provide a boosted drive current in response to an input signal voltage transitioning. The boosted driver current is used by a second operational amplifier ( ) having a single high gain stage ( ). The output drive current of the operational amplifier circuit ( ) is increased to a predetermined maximum value for a predetermined time after an input signal transition in order to source increased current to a capacitive or inductive load only during output signal transitions. Separate current boost circuits ( ) in each of the first and second operational amplifiers enable early signal transition detection and ensure continuation of increased current until completion of the signal transition.

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Austin, TX, United States of America

Chunhe Zhao