Monday, February 01, 2010

Driving PIN Diodes: The Op-Amp Alternative

PIN diodes, which sandwich a lightly doped intrinsic region between heavily doped P and N regions, are used extensively in RF and microwave applications. PIN diode drivers--which provide a controlled forward bias current and reverse bias voltage--use discrete designs or specialized ICs. As an alternative, widely available op amps can be used. Op amps in this class feature wide bandwidth, high slew rate, and enough steady-state current to drive PIN diodes.


At 6:49 AM, Anonymous Anonymous said...

Ad. Fig.6.:
With a Q3 of an NPN type, with its emitter connected to V_ line; much better dynamic properties could be expected.

At 9:23 AM, Blogger john said...

Yes you are correct, it should have be an NPN, we'll correct that error.
John Ardizzoni


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