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We present a fifth order Chebyshev singly-terminated ladder filter with a band-edge frequency programmable from 70-500 MHz implemented in a 0.35 mum CMOS process. It uses constant-capacitance scaled Gm-C integrators, and features a technique for compensation of MOS nonquasistatic effects. Also incorporated in the design is a robust fixed-transconductance bias circuit. The filter has a dynamic range...
In this paper we report a design strategy for VHF filtering in standard digital CMOS processes. The design approach is based on fully-balanced pseudo-differential continuous-time transconductors for applications in low-voltage systems over the VHF range and implemented with MOS-C accumulation capacitors. A 3rd-order Gm-C low-pass Butterworth filter has been implemented, using a 0.35 mum standard CMOS...
In sub-micron process, while speed of device is suitable for VHF applications, phase variation at unity gain frequency of OTA-C cell with frequency tuning is high. This is mainly because of high value of channel length modulation parameter of the devices. A technique which makes the phase response robust to frequency tuning is proposed here. Based on this technique a VHF CMOS OTA-C cell is designed...
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