Abstract
A method of building a system for adjusting the common mode variation of the input signal of the receiver in SERDES systems is presented. A negative feedback connection between the current source with constant conductivity and the matrix of series resistors is introduced, which allows to decrease the variation of common mode voltage level of the continious time linear equalizer circuit. By providing a high voltage level, the current source transistors operate in the saturation mode and provide a low gain in the low frequency range. The simulation results show that in the case of using the proposed method, the amplification of the system at low frequencies decrease by approximately 76% due to the reduction of the amplification factor at working frequencies by about 4.8%.
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