| 摘要 |
A tape cassette type detection apparatus has a tape transit control circuit which supplies a first control signal to a supply reel motor and a take-up reel motor and a second control signal thereto at timing delayed from the first control signal by a predetermined period of time to move a tape wound around a supply reel and a take-up reel in a predetermined direction during a predetermined period. Upon rotation of the supply and take-up reels, pulses are generated by pulse generators in response to the first and second control signals, and are counted by reel counters for periods set by measurement control circuits. Thereafter, the count values are supplied to a rotation ratio calculation circuit as first movement speed data. A pulse generator detects rotation of a capstan for moving the tape and generates pulses. The pulses generated by the pulse generator are counted by capstan counters. An operation circuit calculates the rotation ratio of the tape based on second movement speed data obtained by counting of the capstan counters and the first movement speed data obtained by the rotation ratio calculation circuit and supplied from a system control circuit. The operational circuit discriminates the tape of the tape cassette based on the rotation ratio of the tape in accordance with a signal from a tape-type data generator.
|
