Wireless 900 MHz monitor system

Details Wireless 900 MHz monitor system Wireless 900 MHz monitor system

1995-12-18

1998-06-16

Vo, Nguyen

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

455 66, 455128, H01Q 1112

Patent

active

057686963

ABSTRACT:
A communication device for monitoring audio signals transmitted st high frequencies from a remote location. The device includes a transmitter unit and a receiver unit containing a transmitter circuit and a receiver circuit, respectively. The transmitter and receiver circuits are designed for DC operation at voltages substantially equal to the DC voltages directly applied to the transmitter and receiver units so that the use of step-up converters can be avoided, thereby increasing the duration of time for DC power operation.

REFERENCES:
patent: 4675656 (1987-06-01), Narcisse
patent: 4829570 (1989-05-01), Schotz
patent: 4847903 (1989-07-01), Schotz
patent: 5119072 (1992-06-01), Hemingway
patent: 5272525 (1993-12-01), Borchardt et al.
patent: 5349386 (1994-09-01), Borchardt et al.
patent: 5373548 (1994-12-01), McCarthy
patent: 5410735 (1995-04-01), Borchardt et al.
patent: 5416802 (1995-05-01), Ishii
patent: 5491839 (1996-02-01), Schotz

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