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

49The third amplifier stage has the following characteristics:H3 (s)1— R10 R9 [((RI0C2 )S + 1DC gain: -201Pole: — = —1000R1 0C2(4.8)(4.9)The pole was place far to the right of the imaginary axis for fast response time.Multiplying all the DC gains, the circuit has an overall gain of 70 x -30 x -20 = 42000.The value of the gain was necessary for the small voltage (8011V) compensation and toensure the cancellation of the poles and zeros. The poles and zeros are plotted in Figure4.12 a) and b).Figure 4.12 a) shows the overall view of the pole-zero locations on the s-plane.The cancellation of the amplifier pole and zero with the circuit gain of 42000 can be seenin Figure 4.12 b). Figure 4.12 c) is the view of the root locus plot of the TEC pumpmodel. With the gain of the circuit, the pole and zero canceled each other out.