Digital/analog data simultaneous transmitting system

Abstract

Abstract PURPOSE:To realize a simultaneous transmission of both the digital and analog data via a piece of transmission line, by using the VCO for the split modulating clock oscillator. CONSTITUTION:The analog data is supplied to the control voltage input of VCO1, and the clock which is FM-modulated is supplied from the output of VCO1. This clock is divided into 1/2 by the divider to turn into the clock for the input reading of the digital data. And this clock is supplied to the synchronous circuit to read in the digital data, and the output of the synchronous circuit is supplied to split phase modulating circuit to deliver the split phase output signal. At the demodulating side, analog data (10) is obtained from the above-mentioned signal through polarity converting point detector DIFF, LPF1, LPF2 each. For the digital data, both serial output (9) and reading clock (11) are obtained from FF1-FF3.

Inventors

• 👤 Kaoru Setoguchi

Bibliographic Details