On Tue, 13 Jan 2015 13:17:32 -0700, Jim Thompson
wrote:

Anyone have ideas regarding how to implement a voltage-variable phase
shifter useable at 210MHz?

...Jim Thompson

Do you want to buy it as a part, or build it into one of your IC
designs? How much phase shift do you need?

There are tons of analog IQ modulator chips around, some with a
built-in 90 degree phase shifter. They can do full the 360 degrees if
you apply sin/cos multiplier inputs.

Small phase shifts can be done with a varicap RC or LC network. Or an
RC or LC shifter and a multiplier or two.

Extreme: an inductor-varicap variable-delay transmission line. The
HP8133A had several, insanely long ones.


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com