Pacific Monolithics

Sanjay B Moghe

Allen F Podell

Ravi Ramachandran

Fazal Ali

Robert D Genin

Finbarr J McGrath

Pang-Ting Ho

A feedback circuit couples a base amplifier output to the amplifier input for feeding back a portion of an amplified input signal. The feedback circuit includes an inductor coupled in series with a variable resistance. The variable feedback resistance is provided by a feedback FET having a gate for receiving a control signal for varying the resistance between the source and drain. The gain of the base amplifier is determined over the predetermined frequency range by the combined impedance of the inductor and resistance. The base amplifier is a field-effect transistor (FET). The feedback inductance is taken from a portion of a coil coupling the drain of the base FET with an output terminal.

Gain-tilt amplifier

A switch matrix for particular use in microwave monolithic integrated circuits has FET-based switch elements with at least a combined total of two gates. Embodiments include the use of single and dual gate FETs. A preferred embodiment includes cascode-coupled FETs in series with inductances between input and output terminals. The input is taken from an artificial transmission line formed of a plurality of series-coupled inductors or from the junctions of series-coupled pairs of mutually coupled inductors.

High speed switch matrix

A push-pull monolithic active isloator having a pair of MESFETs in common-gate and common-drain (source follower), parallel configuration. These two FETs are the same size and a diode is inserted between the gate of the source follower and the source of the common-gate FET. A D.C. blocking capacitor is included at the output. Another FET is coupled between the input and ground and responsive to a control signal to vary the current in a biasing resistor between the drain and gate of the source follower.

Growing community of inventors

San Jose, CA, United States of America

Sanjay B Moghe