Readout integrated circuit (ROIC) of linear infrared focal plane array (FPA) with capacitive trans-impedance amplifier (CTIA) should be applied with clock pulses and DC bias voltage.In this paper,a method of designing clock pulses and DC voltage for linear infrared FPA CTIA ROIC is presented.The DC voltage (about 2.6 V) is generated by bandgap reference circuit,and the eight clock pulses (CLK1,CLK2,RESET,SH1N,SH1P,SH2N,SH2P and ST) are generated by a digital logic circuit with two input signals (CLK and LSYNC).Simulation and test results show that this driving circuit can drive FPA steadily.