| 摘要 |
PURPOSE:To minimize the transmission delay and to make the titled encoder suitable for large scale integration by providing a means holding an input analog signal to a sample and holding circuit and deciding a polarity bit at the same time. CONSTITUTION:The titled encoder consists of a sample and holding circuit for an input analog signal, a digital/analog conversion circuit, a voltage comparator and a sequential comparison register. Then a non-inverting input terminal of the voltage comparator is connected to a common terminal of switches S1, S2 switching the analog input signal and ground. The analog input voltage is held and the polarity is decided to convert a PCM 8-bit data in 8 time slots (t1-t8), the transmission delay of the encoder is minimized and it is easily realized by having only to change the circuit connection without requiring any additional circuit and the this circuitry is suitable for large scale circuit integration.
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