JPS57143963A - Data detector - Google Patents

Abstract

PURPOSE:To accurately extracting the data of a timing regenerating circuit, and to detect high-speed data accurately with a simple constitution by using a monostable multivibrator, and performing accurate switching operation to the high-speed data signal. CONSTITUTION:Received data from a data input terminal DT is applied to the data terminal D of a delay type flip-flop D-FF as a timing regenerating circuit. A clock signal CLK extracted from the received data is applied to a monostable multivibrator MMV having variable operation time, and the output of the multivibrator MMV is applied to the clock terminal C of the D-FF through a phase inverting circuit INV. Then, the time constant CR of the multivibrator MMV is adjusted for the timing adjustment of the clock CLK, and thus the operation of the D-FF is made to correspond to the high-speed received data, sampling the data accurately. When the input data is 180 deg. out of phase with the clock CLK, the clock CLK is inverted by the phase inverting circuit IVT before it is applied to the multivibrator MMV.