Fully integrated data receiver and method for receiving on/off k

Details Fully integrated data receiver and method for receiving on/off k Fully integrated data receiver and method for receiving on/off k

1996-11-19

1998-06-30

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375269, 375316, 375320, 375330, 455334, 455337, H03D 500, H03K 900

Patent

active

057745021

ABSTRACT:
A data transmission system in which an on/off keyed (OOK) AM/DPSK modulated data signal with an on/off ratio exceeding about 80 dB which has been modulated on a carrier is received at a compact, easily fabricated and battery powered data receiver which operates without automatic gain control and which includes a double loop antenna (diameter of about two inches) with a trimmer capacitor center tapped to the antenna for providing a conjugate impedance match between the antenna and a low noise amplifier. In the receiver, a square-law detection AM demodulator for demodulating the amplified signal is in a bipolar silicon IC, and a DPSK data detector for decoding the demodulated signal is in a separate digital CMOS IC.

REFERENCES:
patent: 4656432 (1987-04-01), Matsumura
patent: 5285482 (1994-02-01), Sehier et al.
patent: 5416803 (1995-05-01), Janer

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