Linearizer for a PIN diode attenuator

Details Linearizer for a PIN diode attenuator Linearizer for a PIN diode attenuator

2005-12-06

2005-12-06

Nguyen, Duc (Department: 2643)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S169200, C455S180400

Reexamination Certificate

active

06973288

ABSTRACT:
Linearizer circuitry is disclosed for providing control signal outputs to operate a controllable attenuator throughout a relatively large dynamic range while maintaining a relatively consistent return loss. Preferred embodiment linearizer circuitry provides a series control current and a shunt control current for coupling to a PIN diode attenuator, such as may be configured in a π network or a T network. Preferably, differential pairs are utilized in providing each of the control current outputs.

REFERENCES:
patent: 4646036 (1987-02-01), Brown
patent: 6091299 (2000-07-01), Gruneisen
patent: 6285865 (2001-09-01), Vorenkamp et al.
patent: 8 078993 (1996-03-01), None
“A CATV Attenuator Using the Single Package SMP1307-027 PIN Diode Array,” Alpha Industries, Inc. APN 1017, pp. 1-10 Nov. 1999.
“Design with PIN Diodes,” Alpha Industries, Inc., APN 1002, pp. 1-18, copyright Alpha Industries, Inc., 1999.
“Linear Driver for PIN Diode Attenuators,” DR65-0002 Tyco Electronics MA-COM, 2 pages.
Fisher, D.A. et al., “A temperature-compensated linearizing technique for MMIC attenuators utilizing GaAs MESFETs as voltage-variable resistors,” IEEE MTT-S International Microwave Symposium Digest, May 8, 1990, pp. 781-784.
International Search Report for PCT/US02/31260 dated Dec. 12, 2003.

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