RF to DC converter question - RF Cafe Forums
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Post subject: RF to DC converter
Unread post Posted: Fri Feb 11, 2005 5:29 pm
I have an HF amp that produces 1KW. I run this thru a bi-directional coupler with -30db forward port. I need to build an ALC circuit to turn my driver down when the amp begins to overdrive. My exciter external ALC circuit expects to see 0Vdc when no turn-down is needed, and up to -4Vdc when the amp reaches distortion. I need a circuit that will take an RF signal in the HF band and develop an adjustable 0 to -4Vdc out. Any ideas or sources.
Thanks very much.
Unread postPosted: Sat Feb 12, 2005 1:44 pm
Check out Analog Devices - they have some excellent RF-to-DC converters.
Unread postPosted: Tue Feb 15, 2005 12:32 pm
Yes AD. they have linear and logrithmic ICs
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