Alan H Gruber

US Patent:

53999274, Mar 21, 1995

Filed:

Dec 3, 1993

Appl. No.:

8/162714

Inventors:

Alan H. Gruber - Cedar Grove NJ
Mark G. Simendinger - Lodi NJ
Mitch Sparrow - Wayne NJ

Assignee:

ITT Corporation - New York NY

International Classification:

H03K 17687
H03K 1706

US Classification:

327379

Abstract:

An active circuit comprising a component coupled between an input terminal and an output terminal, the component requiring power to operate, and a bypass path which causes a signal to propagate from the input terminal to the output terminal via the component when the component is operating under power and which causes the signal to bypass the component, when the circuit loses power, and propagate from the input terminal to the output terminal via a section of transmission line, the bypass path comprising a bypass circuit having at least two FETs, the two FETs providing high and low impedances, the high impedance being provided when the component is operating, thereby causing the signal to propagate from the input terminal to the output terminal via the component and the low impedance being provided when the circuit loses power, thereby causing the signal to propagate from the input terminal via the section of transmission line to the output terminal. The active circuit according to the present invention further comprises at least four PIN diodes for preventing an output signal feedback at the input terminal.

US Patent:

39463184, Mar 23, 1976

Filed:

Dec 12, 1974

Appl. No.:

5/532108

Inventors:

Alan Herbert Gruber - Cedar Grove NJ

Assignee:

International Telephone & Telegraph Corporation - Nutley NJ

International Classification:

H04B 116

US Classification:

325411

Abstract:

The amplitude of a local oscillator signal for use with a frequency mixer is maintained at a given constant level by a control signal derived from the direct current flow through the mixer diodes.