Design of Very High-Frequency Multirate Switched-Capacitor Circuits provides the idea and the corresponding CMOS implementation of the unconventional multirate sampled-data analog interpolation method which has its nice capability on very high-frequency analog frond-end filtering as a result of its inherent twin benefit of decreasing the rate of data-converters and DSP middle including the specification rest of the publish continuous-time filtering. this method thoroughly removes the conventional phenomenon of sampled-and-hold frequency-shaping on the decrease enter sampling cost. additionally, on the way to take on actual IC imperfections at very excessive frequency, the state of the art circuit layout and format recommendations for high-speed Switched-Capacitor (SC) circuits are comprehensively discussed:
-Optimum circuit structure tradeoff analysis
-Simple pace and tool trade-off research of lively elements
-High-order filtering reaction accuracy with admire to capacitor-ratio mismatches
-Time-interleaved impression with appreciate to achieve and offset mismatch
-Time-interleaved impact with appreciate to timing-skew and random jitter with non-uniformly holding
-Stage noise research and allocation scheme
-Substrate and provide noise reduction
-Gain-and offset-compensation techniques
-High-bandwidth low-power amplifier layout and layout
-Very low timing-skew multiphase generation
Two tailored optimal layout examples in CMOS are awarded. the 1st one achieves a 3-stage 8-fold SC interpolating filter out with 5.5MHz bandwidth and 108MHz output sampling expense for a NTSC/PAL CCIR 601 electronic video at three V. one other is a 15-tap 57MHz SC FIR bandpass interpolating clear out with 4-fold sampling price bring up to 320MHz and the first-time embedded frequency band up-translation for DDFS method at 2.5V. The corresponding chip prototype achieves to date the top working frequency, maximum filter out order and maximum middle frequency with maximum dynamic variety less than the bottom offer voltage when put next to the formerly stated high-frequency SC filters in CMOS.
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