H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/110, 324/37
H04B 1/26 (2006.01) H03J 1/00 (2006.01) H03J 3/14 (2006.01)
Patent
CA 1123918
ABSTRACT OF THE DISCLOSURE A frequency counting apparatus is advantageously utilized as a frequency counter for displaying in a digital manner a frequency being received by a radio receiver. The frequency counting apparatus comprises a quartz resonator adapted to oscillate at a frequency of 2n Hz where n is a positive integer, for example, 32,768 Hz, and a microprocessor including a programming unit, an operating unit for operation in accordance with a program of the programming apparatus, a counter and a control unit. The program steps of the programming unit are made to progress based on the oscillation output signal of the quartz resonator. The counter is supplied with a local oscillation signal of a radio receiver. The local oscillation signal supplied to the counter is gated for a predetermined time period determined in accordance with the program of the programming unit, whereby the local oscillation signal is counted. The count value in the counter is multiplied or divided by a prescribed correction factor preloaded in the programming unit by means of the operating unit.
324020
Inoue Kazuo
Maeda Hidetoshi
Someno Noboru
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
Sony Corporation
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