Radio receiver
AssigneeSanyo Electric Co., Ltd.
InventorTakao Saeki
Life of this patent
Estimating the term…
Abstract
To reduce the number of signal lines in the inside of a radio receiver which determines a reference voltage based on data supplied from an external CPU, the first and second reference value data from the external CPU (1) is supplied to an input section (20) of a PLL control circuit (19), and then latched by a latch circuit (21). The latched data is converted into an analogue reference voltage in D/A converters (23, 24). The reference voltage is transferred to a radio receiving circuit (2) to be supplied to comparison circuits (16, 18) via a single line, respectively, in the inside of the radio receiving circuit (2).
Claims8
A radio receiver for receiving electric waves from a broadcasting station, comprising:
- a heterodyne radio receiving circuit;
- and
- a frequency control circuit for controlling frequency of a local oscillation signal applied to the radio receiver in accordance with frequency data, said frequency control circuit receiving the frequency data outputted from a control circuit in accordance with a receiving frequency,
- wherein
- the frequency control circuit includes a reference voltage generation circuit for converting a plurality of reference data received from the control circuit into a plurality of reference voltages to supply one of the reference voltages to a different circuit to be compared with a detected voltage level in the radio receiving circuit.
Dependencies are inferred from the claim text.