Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1992-03-19
1994-09-06
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
34082544, 4551832, H04B 116
Patent
active
053456050
ABSTRACT:
An individual selective-calling receiver is disclosed which includes a switch, a first timer for generating an output signal in a case where the switch is put in an ON-state for a time longer than a first predetermined time, a second timer started by the output signal of the first timer for generating an output signal at intervals of a second predetermined time, and a receiving-frequency selection circuit (for example, a PLL) for selecting one of a plurality of receiving frequencies, and in which the receiving-frequency selection circuit commences a frequency selecting operation on the basis of the output signal of the first timer. The receiving frequencies are successively selected in accordance with the output signal of the second timer, and the frequency selecting operation of the receiving-frequency selection circuit is stopped when the switch is again put in the ON-state, to maintain a selected receiving frequency.
REFERENCES:
patent: 4785468 (1988-11-01), Yoshida
patent: 4860005 (1989-08-01), DeLuca et al.
Eisenzopf Reinhard J.
Matsushita Electric - Industrial Co., Ltd.
Pham Chi
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