Broadcast receiver with automatic broadcast station storage

Details Broadcast receiver with automatic broadcast station storage Broadcast receiver with automatic broadcast station storage

1983-07-01

1985-12-24

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455184, 455186, H03J 718, H04B 116

Patent

active

045611122

ABSTRACT:
A broadcast receiver comprises a mixer to which an aerial signal and an oscillator signal are applied for generating an intermediate-frequency signal. The oscillator signal is produced by a generator and its frequency is determined by a tuning value which is applied to the generator. In addition, the receiver comprises a number of (N) preselection keys to each of which a predetermined fixed tuning value is assigned, so that by operating such a key that relevant tuning value is directly applied to the generator. Assigning a tuning value to a preselection key is effected by a micro-computer. This micro-computer produces a fixed sequence of auxiliary tuning values which are sequentially applied to the generator. The intermediate-frequency signal obtained in response to each auxiliary tuning value is converted into a test value in a conversion circuit. These test values are compared to reference values from a fixed sequence of decreasing reference values. Only tuning values associated with test values exceeding the reference value are stored. Thus only those tuning values are assigned to the preselection keys which correspond to the broadcast transmitters which are receivable best in the overall wave range at that location.

REFERENCES:
patent: 4387469 (1983-06-01), Miyazaki et al.
patent: 4430753 (1984-02-01), Shiratani

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