Cassette tape player having circuit for detecting reverse rotati

Details Cassette tape player having circuit for detecting reverse rotati Cassette tape player having circuit for detecting reverse rotati

1994-04-06

1996-02-06

Nguyen, John Q.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Automated stop or reverse

360 742, G03B 2150, G11B 1500, G11B 1548

Patent

active

054890713

ABSTRACT:
A system for preventing improper tape feed in a cassette tape player uses pulse width measurements from the take-up reel output signal to sense normal or aberrant tape feeding conditions. The pulse width of the output signal is compared with a predetermined range of pulse widths associated with normal tape operation. The range is variable as a function of the rotational frequency of the take-up reel and is updated periodically to reflect changes in the diameter of the take-up reel as the tape plays. If the pulse width of the output signal falls outside of the predetermined range, it denotes an aberrant tape feeding condition.

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