Couple of years ago, i used a Tayloe-like sampling/ switching mixer to implement a simple lock-in detection setup using some multiplexer and Teensy dev board. Finally this was used to stabilize the frequency of an external cavity diode laser - widely used in atomic clocks, saturation absorption spectroscopy and many more!
One huge advantage of quadrature mixers is that you not only have the amplitude information but also the phase information in reference to you local oscillator. Perhaps you can show that on another video. Nevertheless a nice little video which helps to understand the principles of that mixer.
Dan Tayloe's paper claims "the maximum useful frequency for this detector readily extends to at least 10 GHz," and I can see multiplexers on mouser.com than claim bandwidths into the gigahertz... But I suspect you are right. There would be issues to be solved with higher frequencies. One would have to know more about RF design than I do! My thought is to try for HF frequencies only (3 MHz - 30 MHz). My little demo appears to be OK at 25 MHz, but I lack equipment to be confident of measurements beyond 50 MHz or so. Certainly, the ADALM2000 cannot do it. I think there can also be issues with jitter in generating fast quadrature "F1" signals as well as bandwidth of the mux. As I mentioned in the video, NA5Y has interesting material on radios built with Tayloe detectors. This video shows his mux is not fast enough beyond 75 MHz or so. th-cam.com/video/KA4O8sTaZQo/w-d-xo.htmlsi=DU8M3FKe4uTl5dpq
@@electronics.tinker I have seen a custom chip, based on Tayloe techinque, as a narrow-band 5GHz bandpass filter. So, it is possible. But the commonly used chip (used by NA5Y can't manage it)
I lack experience with truly high-speed signals. Issues I have in mind relate also to signal integrity. I suppose breadboards must fail at some frequency, and RF-friendly techniques become necessary in PCB design. That would be interesting to learn about. Thanks for your comment.
Couple of years ago, i used a Tayloe-like sampling/ switching mixer to implement a simple lock-in detection setup using some multiplexer and Teensy dev board. Finally this was used to stabilize the frequency of an external cavity diode laser - widely used in atomic clocks, saturation absorption spectroscopy and many more!
One huge advantage of quadrature mixers is that you not only have the amplitude information but also the phase information in reference to you local oscillator. Perhaps you can show that on another video.
Nevertheless a nice little video which helps to understand the principles of that mixer.
thank you very much
The problem with Taylor mixer is to find a switching chip which would work at 90-110MHz, and to feed it with quadratures!
Dan Tayloe's paper claims "the maximum useful frequency for this detector
readily extends to at least 10 GHz," and I can see multiplexers on mouser.com than claim bandwidths into the gigahertz... But I suspect you are right. There would be issues to be solved with higher frequencies. One would have to know more about RF design than I do! My thought is to try for HF frequencies only (3 MHz - 30 MHz). My little demo appears to be OK at 25 MHz, but I lack equipment to be confident of measurements beyond 50 MHz or so. Certainly, the ADALM2000 cannot do it. I think there can also be issues with jitter in generating fast quadrature "F1" signals as well as bandwidth of the mux.
As I mentioned in the video, NA5Y has interesting material on radios built with Tayloe detectors. This video shows his mux is not fast enough beyond 75 MHz or so.
th-cam.com/video/KA4O8sTaZQo/w-d-xo.htmlsi=DU8M3FKe4uTl5dpq
@@electronics.tinker I have seen a custom chip, based on Tayloe techinque, as a narrow-band 5GHz bandpass filter. So, it is possible. But the commonly used chip (used by NA5Y can't manage it)
I lack experience with truly high-speed signals. Issues I have in mind relate also to signal integrity. I suppose breadboards must fail at some frequency, and RF-friendly techniques become necessary in PCB design. That would be interesting to learn about. Thanks for your comment.