Quote:
Originally Posted by TrevorG3VLF
Quote:
Originally Posted by Argus25
The cure for this problem is to drive the detector with a current source rather than a voltage source. This is elegantly explained by Horowitz & Hill, with an example circuit which converts the incoming modulated RF voltage to a current source to drive the detector diodes.
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Please tell me where this can be found. I have an early copy of "The art of electronics" and also the third edition.
Thank you |
The Hewlett-Packard Journal is available on the web. Find the issue with the HP 8901A modulation analyzer article in it (for search engine purposes, mis-spell analyser with a zee)
This instrument is a very high performance receiver for measuring modulation depth and deviation. They get used for calibrating sig gens. The HPJ article has a section on its current-driven diode AM detector which makes rather good reading.
David