GPS receiver with reflection amplifiers

Details GPS receiver with reflection amplifiers GPS receiver with reflection amplifiers

2007-08-21

2007-08-21

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S248100, C455S251100, C330S296000, C375S345000

Reexamination Certificate

active

11472051

ABSTRACT:
An AM receiver incorporates an antenna, a transistor, a current source, and a power supply. The antenna is connected to a gate electrode of the transistor and through a link to a signal earth. In operation, the antenna receives radiation and generates a corresponding input signal which propagates to the gate electrode. The transistor is operable to process the input signal in two steps, namely to reflectively amplify the input signal to generate a correspondingly reflectively amplified input signal at the gate electrode in a first step, and amplitude demodulate the amplified input signal in a second step. The transistor is operable in a non-linear region of its current/voltage characteristic whereas it simultaneously provides reflective amplification and signal demodulation, namely the two steps occur simultaneously. In contradistinction, conventional demodulators employing gain devices operating non-linearly to provide amplitude demodulation incorporate the devices configured to function as transmission amplifiers.

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Sarkissian, J.C. et al.,A 60 GHz HEMT-MMIC Analog Frequency Diider by Two, GaAs IC Symposium, IEEE 1994, pp. 104-107.

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