Has anyone looked closely at Jim's Class D/E EER tx ? From: [email protected] Stefan Schäfer Sent: Sunday, July 31, 2011 2:47 PM To: [email protected] rsgb_lf_group@blacksheep
Ah, regarding the overlap times: I successfully tried a SG3525 SMPS driver to obtain a defined dead-time. So i won't need the inverted signal but a 50% duty cycle anyway. Power losses of the FETs (4x
Stefan: I think you'll find Andy is right :-) As I understand your circuit description, the output of the XOR gate will be a fixed-duration (function of your RC time constant) positive-going pulse tr
Hello Stefan, all, A "single IC" solution to get a 50% duty cycle might be 4046 (or 40HC46) PLL without a divider (connect VCO out directly to comparator in). The VCO has a pretty good 50% duty cycle
LF, VLF, I just re-invented the wheel ;-) Just by thinking i found one possible way how to double and divide a rectangular signal, to achieve an accurate 50 % duty cycle :-) One could take a simple X
Hello Stefan, I agree with Andy. The XOR gate will produce a "spike" al the edges (rising and falling) of the input signal. The with of the spikes will be determined by the RC constant. If the duty c
Andy, Rik, Bill, ... Am 31.07.2011 16:20, schrieb Bill de Carle: You can visualize it more easily by drawing it out on paper [...] Hmmmmmmmmmmmm, yes, i must agree. A pity ;-) Will go on thinking. Bu
No, that doesn't work to give a true square wave. If the RC delay is not exactly 50% you get a repeated double pulse waveform and not a series of equally spaced 2.F pulses. On dividing this by 2
Oh dear, sorry for 1000s mails today. I got another idea: If you want a 50% duty cycle at 2x f input, you may just add another XOR gate and do the same again. Then having 4x f input at an unaccurate
Hi Andy, True. But if the goal is not to obtain a 2x f signal but an accurate 50% square wave drive signal at 1 x f, this must be a suitable method. And furthermore the circuit generates a inverted s
Dear Graham, Stefan, LF Group, Has anyone looked closely at Jim's Class D/E EER tx ? Well, Jim has ;-) All that is used is a limiting amplifier to "square up" the input sine wave. For a push-pull PA,
Complimentary my dear Watson ...... hi G.. Dear Graham, Stefan, LF Group, Has anyone looked closely at Jim's Class D/E EER tx ? Well, Jim has ;-) All that is used is a limiting amplifier to "square u
