DESIGN PAFUMETERS FOR OUR SIXTH - ORDER BP IZA MODUUTOR Parameter
نویسندگان
چکیده
The traditional low-pass ZA analog-to-digital converter is extended to the bandpass case. For input signals with small relative bandwidths, bandpass !ZA converters offer high signal-to-noise ratios at significantly lower sampling rates tban are required for low-pass XA converters. A sixth-order single-ended switched-capacitor circuit, clocked at 3 MHz, is designed to convert bandpass signals centered at 455 kHz with 20-kHz bandwidth. Time-domain circuit simulations find that this modulator realizes a 94-dB signal-to-noise ratio for a half-scale input, giving roughly 16-bit performance.
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