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Design >> RF Design >> Analog phase shifter
https://designers-guide.org/forum/YaBB.pl?num=1337175350

Message started by kr106 on May 16^th, 2012, 6:35am

Title: Analog phase shifter
Post by kr106 on May 16^th, 2012, 6:35am

I already made fixed phase shifter but I need to make an (variable) analog phase shifter (0-180°) with variable control voltage (0-13V) at 2.45 GHz centre frequency using ADS tools. Anyone can give me idea about whole circuit schematic or provide me any made schematic.

Title: Re: Analog phase shifter
Post by raja.cedt on May 16^th, 2012, 6:49am

hello,
what kind of signal you are going to delay? If it is a digital signal better go for gilbert mixer which gives variable phase shift, but it need I &Q signals. If they pure analog i donno may be RC phase shifter with Controlled R

Thanks,
raj.

Title: Re: Analog phase shifter
Post by loose-electron on May 20^th, 2012, 10:17am

is this purely for a math model or are you going to need to make it out of transistors later on?

Title: Re: Analog phase shifter
Post by aaron_do on May 20^th, 2012, 5:57pm

The control voltage sounds very large (13 V). What technology are you using? At low frequencies, you can use an op-amp based all-pass filter. There are also passive RLC methods to design an all-pass filter.