Single-channel communication encoding method, decoding method, encoding circuit and decoding circuit

Abstract

The invention relates to a single-channel communication encoding method, decoding method, encoding circuit and decoding circuit. The single-channel communication encoding method includes: synthesizing a clock signal and a data signal into a long-short code signal; the long-short code signal includes a long-code signal and a short-code signal , the pulse width of the long code signal is consistent with the clock signal, and the pulse width of the short code signal is consistent with the clock signal; the duty cycle of the long code signal and the short code signal is different. This coding method encodes the clock signal and the data signal at the same time, which can reduce the circuit Complexity, and reduce chip packaging wiring.

Description

technical field [0001] The invention belongs to the field of analog-digital hybrid circuits, and in particular relates to a single-channel communication encoding method, a decoding method, an encoding circuit and a decoding circuit. Background technique [0002] The digital isolator is used for communication, which includes a source side and a secondary side, and the secondary side receives the signal sent by the source side. [0003] figure 1 It is a common method of isolated data and clock transmission. The data and clock on the source side use an isolation channel to transmit the signal to the isolated secondary side. This method needs to occupy two isolation channels, and the power consumption is large during operation. The round cost is high, and more wiring is required when the chip is packaged, and the packaging cost is high. [0004] figure 2 For single-channel isolated communication based on clock data recovery technology, the data signal synchronized with the c...

AI Technical Summary

Problems solved by technology

[0007] (1) Unable to communicate a long series of "0" or "1" signals;

[0008] (2) The data code rate and phase of the transmission signal deviate from the frequency and phase of the voltage-controlled oscillator in the clock data recovery circuit at the receiving end, and it takes a long time to complete the frequency and phase locking. Therefore, it takes a long time to establish communication ;

[0009] (3) The clock data recovery circuit needs to lock the frequency first and then lock the phase. There are many control loops, the design complexity is high, and the implementation cost is high

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