Integrated circuit demodulator component

Details Integrated circuit demodulator component Integrated circuit demodulator component

1991-10-10

1993-12-28

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 31, 370 15, 371 205, H04B 346, H04B 1700

Patent

active

052746682

ABSTRACT:
An integrated circuit demodulator component contains a demodulator circuit (90), a first input (12) and an output (30) connected to the demodulator circuit (90). Furthermore the demodulator component (10) has a second input (18) and a multiplexer (80), which is controlled by a selector signal at a selector input (110). The multiplexer optionally connects the first input (12) or the second input (18) to the demodulator circuit (90). This permits a test of the integrated circuit demodulator component (10) during operation with operational signals. To this end, a signal from a modulator component (148) is applied to the second input (18) through a test feedback loop (210). A processor (142) compares the output signal of the integrated circuit demodulator component (10) at a receiver (174) with a signal transmitted by a transmitter (178). In the case of non-identity, either the modulator component (148) or the demodulator component (10) is defective.

REFERENCES:
patent: 4688209 (1987-08-01), Banzi, Jr. et al.
patent: 4785464 (1988-11-01), Judeinstein et al.
patent: 4866775 (1989-09-01), Katakura
patent: 4918623 (1990-04-01), Lockett et al.
patent: 5010544 (1991-04-01), Chang et al.

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