Analysis of 320X240 uncooled microbolometer focal plane array ...

47[(RiR2C1)s + — (R1 + R2) 4.1( )(Rig)s +1Pole of the function is solved by setting the denominator equal to zero,1—0.04545.R1 Ci(4.2)Similarly, zero of the transfer is determined asR 1 + R 2- —0.049785,Ri R2 CI(4.3)and the pole and zero of the equation are plotted in Figure 4.12 c).Based on the transfer function the TEC pump model, the thermoelectric controllercircuit (Figure 4.10) was designed. The controller is a lag compensator with a differentialgain. The controller circuit configuration was chosen due to its flexibility of positioningpoles and zeros of the controller, easily adjustable for the complex TEC pump models,without losing gain control.Figure 4.10 The thermoelectric cooler controller circuit schematic.