Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1992-10-09
1995-11-07
Urban, Edward F.
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
455127, 455343, 307125, H04B 140
Patent
active
054654009
ABSTRACT:
Disclosed here is a power supply control circuit responsive to a control signal for intermittently supplying a battery voltage to a frequency synthesizer so as to restrain the exhaustion of the built-in battery. In order that the charge of the capacitor of an active LPF, inserted between the built-in battery and the frequency synthesizer to constitute this power supply control circuit, may not be released toward the synthesizer side during the suspended period of voltage supply to the synthesizer, switching means responsive to said control signal is added. This power supply control circuit can advance the rise of the supply voltage, and accordingly the stabilization of the output frequency of the synthesizer, when said voltage supply is resumed.
REFERENCES:
patent: 3566143 (1971-02-01), Paine
patent: 4317056 (1982-02-01), Alberts
patent: 4342922 (1982-08-01), DiMassimo et al.
patent: 4673892 (1987-06-01), Miyashita
patent: 4864155 (1989-09-01), Scmitz
patent: 5270576 (1993-12-01), Kahle
patent: 5317309 (1994-05-01), Vercellotti et al.
patent: 5402446 (1995-03-01), Minami
NEC Corporation
Urban Edward F.
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