Switched Capacitor Filter Implementation
In this chapter the filter circuits will be simulated taking into account the non-ideal effects described in fifth chapter. Due to these effects the band-pass filter will be altered, adding a new capacitor to the circuit. This is done in order to take into account the input capacitance of the low gain amplifier and facilitate the compensation of this capacitance. The simulated circuits include second-order low-pass filters, two operating at 1.2 V using the buffers presented in the fifth chapter, one operating at 0.9 V, and a sixth-order filter obtained from cascading three biquadratic sections operating at 1.2 V. The band-pass filter circuit was also simulated for a second-order filter, and a fourth-order filter obtained from cascading two biquadratic sections, all operating at 1.2 V.