Differential signal generating circuit and electronic system
A differential signal and generation circuit technology, applied in the direction of logic circuit interface device, logic circuit connection/interface arrangement, etc., can solve the problems of poor differential signal quality, influence of data transmission accuracy, etc.
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[0032] As mentioned in the background art section, the quality of the differential signal generated by the differential signal generating circuit in the prior art is not good, which seriously affects the accuracy of data transmission in the transmission protocol using the differential signal.
[0033] The inventor of the present application conducted principle analysis and signal simulation on differential signals and a differential signal generating circuit.
[0034] Since the modern high-speed differential signal transmission protocol has certain requirements on the differential signal, for example, it may be required, such as MIPI protocol, that both the differential mode voltage and the common mode voltage of the differential signal are required to be 200mV. Such as figure 1 As shown, the common mode voltage VCM of a pair of differential signals in the figure is about (0.1V+0.3V) / 2=0.2V.
[0035] figure 2 It is a circuit diagram of a differential signal generating circuit...
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