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Hello,
I'm working on 12V->24V boost converter 36W max. I choose CC mode and current mode controller (UC3843).
I have problems / questions about the feedback loop:
Is current mode a good choice if the output current is not constant and changing from 10% to 80% of the maximum current ?
The...
Re: GSM auto power-up
Hi,
I will try to solder two wires from the On/Off touch to a relay or an optocoupler and ignite the phone with the microcontroller.
It seems the simplest solution for the moment.
GSM auto power-up
Hello,
I'm currently working on a GSM remote controller based on an old GSM phone.
I looking a way to make an auto power up of the phone after a power cut.
I don't know if it is possible to do this with specific brands/models because for all the phones I have, I must switch...
GSM auto power-up ?
Hello,
I'm currently working on a GSM remote controller based on an old GSM phone.
I looking a way to make an auto power up of the phone after a power cut.
I don't know if it is possible to do this with specific brands/models because for all the phones I have, I must switch...
You can get circulators in RF surplus shop. Be carreful they are specified for a defined frequency. I never see circulator for frequencies below VHF.
If the output power is high you will probably need pin diodes in the receiver
chain because there will be still enough power for the front-end...
Ok thanks for your advice
For information I use "Pointer - Robust Optimization"
Sometime there are strange things with optimiser: it's giving a stub with 1E-10mm lenght so I delete and I get a complete different result !
Anyway I hope to have the pcb next week and I will see...
pointer robust office
Hello,
I'm currently designing a lna for 10GHz band with Microwave Office. I make the gaasfet stable with a serie resistance in the drain and I match the input to be inside the smallest noise circle and the output is matched to 50R.
According the theory this is an optimal...
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