High-frequency low-power multirate SC realizations for NTSC/PAL digital video filtering

This paper proposes a cost-efficient multirate Switched-Capacitor structure and its realization for a high-frequency low-power sampled-data anti-imaging filter with 108 MHz output sampling rate for CCIR-601 NTSC/PAL digital video. The filter employs a 2-stage (8-tap + 6-tap) improved multirate FIR polyphase structure with double-sampling techniques to achieve the desired linear-phase filtering with 5 MHz-corner passband (<±0.25 dB ripple) and 22 MHz-corner stopband (>40 dB attenuation) as well as an embedded sampling rate increase from 27 MHz to 108 MHz. The circuit, designed with 0.35 μm CMOS technology, is expected to consume only about 28 mW for the analog part at 3.0 V supply