Double-Capacitor Technique for Wide Frequency Range Phase Compensation in G(m)-C and MOSFET-C Filters

作者：Khumsat Phanumas^*; Worapishet Apisak; Surakampontorn Wanlop

来源：IEICE - Transactions on Electronics, 2009, E92C(1): 178-182.

DOI：10.1587/transele.E92.C.178

• G(m)-C filter
• MOSFET-C filter
• phase compensation
• phase error
• capacitive peaking

A double-capacitor phase error compensation configuration is proposed for G(m)-C and MOSFET-C filters. The use of two capacitors enables the effective compensation capacitance to track with the tuning resistance, thereby making it more effective over a wider frequency tuning range as compared to the conventional single-capacitor configuration. Simulations of 5th-order Chebyshev filters in a 0.18 mu m CMOS process with more than one octave tuning range were carried out to demonstrate the viability of the proposed double-capacitor configuration for both G(m)-C and MOSFET-C filters.

• 出版日期2009-1