Stochastic Time-Digital Converter

摘要

A stochastic time-digital converter (STDC) including an input switching circuit, an STDC array, and an encoder. A clock circuit inputs two clock signals into two input terminals of the input switching circuit; the input switching circuit transmits the two clock signals in a cyclic cross-transposition form to two input terminals of the STDC array, and simultaneously outputs a trigger control signal to the encoder; each comparator in the STDC array independently judges the speeds of the two clock signals and sends the judgement results to the encoder for collection and processing; and the encoder outputs the size and positivity or negativity of the phase difference of the two clock signals. The technical solution utilizes the stochastic characteristic of the STDC to double the number of the equivalent comparators in the STDC array, eliminating the effects on the circuitry of device mismatching and processes, power supply voltage, and temperature.

主权项

1. A stochastic time-digital converter (STDC), comprising an STDC array, an encoder, and an input switching circuit, wherein, a clock circuit inputs two clock signals into two input terminals of the input switching circuit separately, the input switching circuit feeds the two clock signals input by the clock circuit into two input terminals of the STDC array in an interleaving manner, and outputs a trigger control signal to the encoder at the same time; each comparator in the STDC array judges speeds of the two clock signals separately, and sends a judgment result to the encoder for treatment; the encoder outputs a magnitude and positive/negative of phase difference between the two clock signals.