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Thanks to FvM !
I paste a longer period of waveform, see below.
Now, there is no signal at Q4. So some circuit can't work at all. How to deal with it ?
I used verilog to write a piece of code as below
always @(posedge CLK)
begin
Q1<= Sin;
Q2<=Q1
if (Q2 && Q1)
Q3<= 1'b1;
else
if (!Q2 && !Q1)
Q3<= 1'b0;
Q4 <= Q3;
end
The behavioral simulation was ok, when I do post-fit simulation, the result was...
Is it possible to generate VPP with 4550 or 877 chip? I know some chips can generate VPP with 3 capacitors and 3 diodes. Thus VPP hardware circuit can be substitued by a few cheap components, of course the VPP can be adjusted by PWM.
I am designing an RFID reader(125Khz). The series resonance circuit is fit to transmit and parallel resonance circuit is good for receive. If I want to use one coil in the reader, how to choose ? The coil current is about 150-200mA, which will make enough energe to transponder. Any suggestions...
Many thanks to VVV!
There is no reference in my circuit, but I refer your idea and design a control signal to let the power to soft-start.
Give you a helped me!
Thank you very much !
I need a power circuit: input voltage +9v, output voltage +5v, current 200ma. Some components require the voltage raises slowly when the power starts. Is there anyone has such experiences ?
I have a bit experience of 4051. If the input voltage is higher than power voltage, or less than ground, the chip will do some unimaged actions. You may check the input voltage.
A serial LC resonance circuit need to be protected from big current , so I want to use a current check circuit and decide if the power switch cut off. A few seconds delay time is needed.
Any suggestions and ideas will be helpful.
Regards
This part is used as antenna of 125khz transceiver. I think that L1, L2, L3 and c4~c10 consist of a resonance circuit. But I don't know if it is right.
what action do c2,c3 and L4,L5 have?
Java and pic
I know an example which uses java to program almost pic mcus. The author was a university student when he wrote the program. The software is called BumbleBee, one can visit his webpages at **broken link removed**
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