Superregenerative AM demodulator

Details Superregenerative AM demodulator Superregenerative AM demodulator

2006-06-20

2006-06-20

Urban, Edward F. (Department: 2685)

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

C455S073000, C455S214000, C455S248100, C455S289000, C455S108000, C342S042000, C375S324000, C375S300000

Reexamination Certificate

active

07065328

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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A 60 Ghz HEMY-MMIC Analog Frequency Diider by two, J. C. Sarkissian, et al., GaAs IC Symposium, IEEE 1994, pp. 104-107.

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