JPH0416630U

JPH0416630U -

Info

Publication number: JPH0416630U
Application number: JP5417890U
Authority: JP
Priority date: 1990-05-25
Filing date: 1990-05-25
Publication date: 1992-02-12
Anticipated expiration: 2005-05-25
Also published as: JPH0743781Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示すブロツク図
、第２図は第１図の各部の信号波形を示す動作タ
イムチヤート。１……右リールパルス信号入力、２……左リー
ルパルス信号入力、３……リーダーテープ検出信
号、４……テープ走行方向識別信号入力、５，６
，７……入力側ゲート回路、８……リトリガブル
ワンシヨツトマルチ、９……フリツプフロツプ、
１０……ワンシヨツトマルチ、１１……微分回路
、１２，１３……出力側ゲート回路、１４……イ
ンバータ、１５……停止信号出力、１６……順方
向走行起動信号出力、１７……逆方向走行起動信
号出力。なお、各図中同一符号は同一又は相当部
分を示すものとする。 FIG. 1 is a block diagram showing an embodiment of this invention, and FIG. 2 is an operation time chart showing signal waveforms of various parts in FIG. 1...Right reel pulse signal input, 2...Left reel pulse signal input, 3...Leader tape detection signal, 4...Tape running direction identification signal input, 5, 6
, 7... Input side gate circuit, 8... Retriggerable one-shot multi, 9... Flip-flop,
10... One shot multi, 11... Differential circuit, 12, 13... Output side gate circuit, 14... Inverter, 15... Stop signal output, 16... Forward running start signal output, 17... Reverse direction Travel start signal output. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of Claim for Utility Model Registration] Tape used to wind the tape on the left reel onto the right reel in a cassette tape recorder endless operation circuit that can repeatedly record or play back a series of audio signals using an auto-reverse type cassette tape recorder. The running direction of the tape is defined as the forward direction, and the opposite running direction is defined as the reverse direction. A tape running direction identification signal whose logic is inverted by a running direction reversal start signal generated in accordance with a leader tape detection signal detected at both ends of the tape is input, and the above-mentioned right reel pulse signal is output during forward direction running. However, during running in the reverse direction, the input side gate circuit that outputs the left reel pulse signal is triggered at the falling point of the output pulse of this input side gate circuit, and the maximum value of the pulse repetition period of the above reel pulse (left reel pulse signal) is triggered at the falling point of the output pulse of this input side gate circuit. A retriggerable one-shot multi with a time constant that is smaller than a flip-flop, a means for resetting the flip-flop by the leader tape detection signal, a one-shot multi, which is triggered at the falling point of the flip-flop and has a predetermined time constant, and a stop for controlling the tape to stop running from the output of the one-shot multi. A differential circuit that generates a signal output, and an output side gate circuit that generates a forward running start signal output and a reverse run start signal output from the output of the one-shot multi and the tape running direction identification signal input. A cassette tape recorder endless operation circuit.