Transmitting/receiving system with frequency and phase detector

Abstract

The invention provides a transmitting / receiving system with a frequency and phase detector. The system comprises a clock / information reply type receiver, a frequency eliminator and a transmitter, wherein the clock / information reply type receiver is used for receiving external signals from a mainframe device, and analyzing the external signals to form a clock signal and an information signal; the frequency eliminator is used for executing frequency elimination on the frequency of the clock signal so as to form a reference clock signal; and the transmitter is used for transmitting an output information content to the mainframe device according to the reference clock signal.

Description

technical field [0001] The present invention relates to a transmission / reception system, and more particularly to a transmission / reception system with a frequency and phase detector. Background technique [0002] In electronic data processing systems, data transmission and data reception need to be based on a oscillating reference clock (Crystal Reference Clock) REF, such as figure 1 Shown is a block diagram of a transmission / reception system (Transceiver) 100 with an external oscillating reference clock in the prior art. The transmission / reception system 100 includes a clock / data recovery type receiver (Clock and Data Recovery Type Receiver) 102 , a quartz oscillator 104 and a transmitter (Transmitter) 106 . The clock / data recovery type receiver (CDR Type Receiver) 102 receives an external signal RX with a transmission frequency, that is, the external signal RX transmits a signal to the clock / data recovery type receiver 102 at the transmission frequency, And the quartz os...

AI Technical Summary

Problems solved by technology

In order for the clock / data recovery receiver 102 to correctly receive the external signal RX, the oscillating reference clock REF must be equal to the sending frequency of the external signal RX, that is, the quartz oscillator 104 provides the clock / data After the oscillating reference clock of the recovery receiver 102 must be locked (locked) to the transmission frequency, the clock / data recovery receiver 102 can begin to receive the external signal RX, but the locking operation of the frequency must pass multiple detections The circuit can work, but the detection circuit is not easy to accurately lock to the frequency of the sending clock, so that the flexibility of using the operating frequency of the clock / data recovery receiver 102 is considerably limited, that is, the oscillation reference clock and the The frequency difference between the sending frequencies must be accurate to within ±0.5%, so that the clock / data recovery receiver 102 is sufficient to lock on to the external signal to generate a clock signal and a data signal, and to enable the transmitter 106 to generate output data

Moreover, the transmission / reception system 100 must additionally be provided with the quartz oscillator 104 to generate the oscillating reference clock, resulting in increased manufacturing costs

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