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waking up circuit at particular voltage

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teekay_tk

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Voltage

Hi all

I have an RSSI output from my receiver. I would like to wake up the rest of the circuit when the RSSI output voltage goes above 0.6V. This voltage is uaually 0.4V and can go upto 1.5V. The system is running on a 3V supply. So I want to convert the voltage as follows

0-0.6 Volts in -> output = 0V
0.6 to 1.5V in ->output =3V

what would be the simplest way to achieve this?
 

hameeds01

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Re: Voltage

Use a simple comparator with 0.6 limit

another way use a Diode connected to the NPN transistor Base via 1k,
voltage drop across diode = 0.65 app
 

garg29

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Re: Voltage

teekay_tk says right, use the circuit I have shown for precision use a multiturn variable resistor instaed of fix resistor.
 

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