Burst signal transmitter capable of producing correct transmissi

Details Burst signal transmitter capable of producing correct transmissi Burst signal transmitter capable of producing correct transmissi

1997-10-15

2000-03-07

Pham, Chi H.

Pulse or digital communications

Transmitters

375312, 455126, H04L 2704

Patent

active

060349999

ABSTRACT:
In a burst signal transmitting apparatus for power-amplifying a burst signal to transmit the power-amplified burst signal, a correct transmission output can be obtained even in an initial burst signal after a power supply is turned ON. In this burst signal transmitting apparatus, a signal supply to a transmission antenna is blocked by a switch for a predetermined time period after the power supply is turned ON, but this signal is supplied to a dummy. During this time period, the initial burst signal is produced, and an automatic level control is carried out for this initial burst signal by way of an automatic level control loop constituted by a detector, an LPF, a differential amplifier, a reference voltage source, and a variable attenuator. Accordingly, the transmission level is converged to become constant. Thereafter, the burst signal is supplied to the transmission antenna by the switch, so that the operation is entered into the normal operation.

REFERENCES:
patent: 5179353 (1993-01-01), Miyake
patent: 5193223 (1993-03-01), Walczek et al.
patent: 5204637 (1993-04-01), Trinh
patent: 5369789 (1994-11-01), Kosugi et al.
patent: 5381115 (1995-01-01), Timmons et al.
patent: 5530923 (1996-06-01), Heinonen et al.
patent: 5548826 (1996-08-01), Sayers
patent: 5640691 (1997-06-01), Davis et al.
patent: 5852778 (1998-09-01), Kasamatsu

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