Arcoman Posted September 1, 2023 Author Share Posted September 1, 2023 I don't argue. ))) wow. I didn't know who I was talking to. he gave a piece of the scheme. I'm glad. thank you. you are man. thank you Link to comment https://www.detectorprospector.com/topic/23877-help-teknetics-g2/page/3/#findComment-253262 Share on other sites More sharing options...
PimentoUK Posted September 1, 2023 Share Posted September 1, 2023 The XOR gate is used as a digital mixer. The digital output is low-pass filtered, to give a DC voltage. This DC voltage varies as the phase relationship between the two logic inputs varies. It is a common part of a phase-locked loop ( PLL ) circuit, for example the CMOS CD4046, which has 3 choices of phase comparator. Link to comment https://www.detectorprospector.com/topic/23877-help-teknetics-g2/page/3/#findComment-253266 Share on other sites More sharing options...
Arcoman Posted September 1, 2023 Author Share Posted September 1, 2023 I didn't know about it. can you give more details. unless of COurse you're busy. Link to comment https://www.detectorprospector.com/topic/23877-help-teknetics-g2/page/3/#findComment-253268 Share on other sites More sharing options...
PimentoUK Posted September 1, 2023 Share Posted September 1, 2023 A simple introduction: PLL introduction PLL phase detectors An advanced course, pdf: advanced PLL The CD4046 PLL IC datasheet pdf: CD4046 datasheet I do not know how this XOR gate phase comparator is used in the Goldbug circuit. Maybe to synchronise one oscillator to another ? The "slave" PIC micro that is used to drive the complex LCD will likely operate at a lower clock frequency than the main "brains" PIC. Having two micro's generating independant electrical interference could be a problem for the analogue parts of the circuit. Synchronising one micro to the other may help control this. It is a technique I have seen versions of in several metal detector designs. 1 Link to comment https://www.detectorprospector.com/topic/23877-help-teknetics-g2/page/3/#findComment-253271 Share on other sites More sharing options...
Arcoman Posted September 1, 2023 Author Share Posted September 1, 2023 Ок Link to comment https://www.detectorprospector.com/topic/23877-help-teknetics-g2/page/3/#findComment-253273 Share on other sites More sharing options...
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