On Tue, 13 Jan 2015 15:54:17 -0800, John Larkin
wrote:
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.
Crikey! Why didn't I think of that... marvelous! Thanks for the
pointer!
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.
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice
480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at
http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.