Circuit for stabilizing the bias of a paging receiver with power

Details Circuit for stabilizing the bias of a paging receiver with power Circuit for stabilizing the bias of a paging receiver with power

1991-07-29

1994-04-12

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

455214, 455337, H04B 116

Patent

active

053034201

ABSTRACT:
There is disclosed a circuit for stabilizing the bias of a paging receiver. An oscillation control signal of first period is generated at the time when a voltage source is connected to the RF components. An oscillation means generates a signal of the center frequency of a received modulated signal in response to the oscillation control signal. A demodulation means demodulates the signal of the center frequency so as to generate a signal of second voltage that is received by a waveform reshaping means to stabilize the bias into the level of the second voltage. The RF receiver converts the received RF modulated signal into a signal offset by a frequency deviation from the center frequency during second period after the termination of the first period. The demodulation means generates a demodulated signal of first or third voltage according to the logical state of the received modulated signal. The waveform reshaping means compares the received demodulated signal with the bias so as to generate a digital signal of a constant duty ratio.

REFERENCES:
patent: 4479261 (1984-10-01), Oda et al.
patent: 4590618 (1986-05-01), Heath et al.
patent: 5025251 (1991-06-01), Mittel et al.

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