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I have a question with a system(please check the file that i attached)
In the system i want to make 1Mhz frequency with 6.6V Amplitude.
and want to use 3.3V to operate PSoC3.
Is this possible?
as i know, the Gate Voltage of FET could give a effect to Vds.
and when i use 3.3V to MPU, it mean the gate voltage of Inside FET is 3.3V.
so, i worried with the system that i attached.
I don't know anything about Characteristics of Inside FET.
if you know, plese let me know.
Thank you.
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PSoC 3
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Hi ysl,
Have you tried using an external FET acting as a switch?
PSoC (while operating at 3.3V) can be used to generate a 1MHzsquare wave which will drive the gate.
The output will be inverted square wave spanning from 6.6V to ~0V.
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Yeah,what ^ said is a better idea.
Use a BJT or FET as a switch,and let it fire out your waveform of reqd amplitude,when driven by the PSoC.
Or,add some small Non-inverting op-amp based amplifier.. or similar.
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Hello ! First and foremost, you can not use the circuitry that you have shown. You can not pull up a GPIO on PSoC to 6.6 V. On any GPIO, the maximum voltage that can appear is VDDIO+0.5V.
However there is a cool feature in PSoC called, SIO. There are 8 SIOs in PSoC3/PSoC5. These pins can take a maximum voltage of 7V irrespective of what voltage is applied on VDDIOs. These SIOs are spread from P12[0] to P12[7] one in each quadrant of the chip.
You circuit would straight away work with an SIO at 6.6V !
Your other possible option is to use external MOS or BJT or even Relay 😄
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Oh yes,the SIOs!
Nice one U2...A handy thing to keep in mind.
<goes to read up on SIOs>
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AN60580 - SIO Tips and Tricks in PSoC® 3 / PSoC 5
http://www.cypress.com/?rID=40989
I'm so gonna read this after these exams get over.
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Thank you for your reply.
I will try with SIO.
Thank you again.