Automatic reading apparatus for capstan reproducing speed mode

Details Automatic reading apparatus for capstan reproducing speed mode Automatic reading apparatus for capstan reproducing speed mode

1989-07-24

1991-10-15

Miller, Stanley D.

Electrical pulse counters, pulse dividers, or shift registers: c

Counting or dividing in incremental steps

Beam type tube

377 20, 235103, 307271, 360 7306, G01P 356, G01P 348

Patent

active

050577840

ABSTRACT:
An apparatus for automatically reads a mode of a capstan reproducing speed by counting pulse signals generated from a capstan motor. This apparatus uses a pulse generator for generating pulse signals and, a frequency multiplier for doubling the capstan frequency generator signals. A counter circuit is used for counting output pulse signals of the frequency multiplier, and a gate processing circuit outputs three different reproducing speed discrimination control pulse signals in response to the signals counted by the counter circuit. A detection error compensating circuit outputs an Extended playing mode discrimination signal and a Long Playing mode discrimination signal from a reproducing speed discrimination control signal of the gate processing circuit by being driven by the pulse signals of the pulse generator. A Standard Playing mode discrimination signal is outputted by a logic combination from output signals of the detection error compensating circuit.

REFERENCES:
patent: 4341995 (1982-07-01), Hennick
patent: 4624005 (1986-11-01), Tachino
patent: 4682247 (1987-07-01), Doutsbo
patent: 4763261 (1988-08-01), Imanaka et al.
patent: 4777448 (1988-10-01), Satoh
patent: 4839834 (1989-06-01), Omae et al.

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