Abstract:
A novel switched-R-MOSFET-C input branch is proposed for low-voltage and high-linearity applications. The tunability is achieved by varying the clock duty cycle using an automatic tuning circuit. This tuning method does not involve a change in gate voltage, and is therefore particularly suitable for low-voltage applications. The advantages of the proposed method are illustrated with the design and simulation of a high-Q biquad filter with a supply voltage of 1 V. The designed filter has a high simulated linearity with THD up to -100 dB.
