| 摘要 |
The pass band filter includes a filter (1) followed by a 'sample-and-hold' circuit (2) and an 8-bit analogue-digital converter (3) with a digital filter (4) in series. Each of the last three components includes a clock timing input, the sample-and-hold circuit and converter receiving a first rectangular pulse clock signal (CLO), and the digital filter receiving a second signal of different frequency (CL1/2). The digital filter (4) includes two partial filters mounted in series, with a data bus supplying them, linking them together, and taking their output, via an envelope detector to the final output.
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