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- The 300 ~ 500 mV pulses are rather small. They would need to be amplified. Does anyone know of a low current amp?
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- Or a low current Schmitt Trigger that can be set/reset by the pulses. Another possibility is a low current bistable (Flip Flop) that can be set/reset by the pulses. Any suggestions?
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quote="ljcox"]
radhi said:
- Will LM 311 would do the anplification job.
1. The LM311 is a voltage comparitor, not an amplifier. However, it could be configured to work as a Schmitt Trigger to do what we want. But is has a supply current of about 3 mA and needs +5 Volt & - 5 Volt supplies.
2. Is this suitable for your application? I would assume not since you want it to be battery operated.
-- i would prefer to run with battery source. if envitable, i do not mind to go for a +5V/=5 V supplies required for most of the ICs.
You did not answer my other questions:
a) Alternatively, can you take the pulse from the junction of L1 and C1?
- If so, what amplitude is it? Is there any ringing? Obviously it will be centred around +3 Volt, but that will not matter if the amplitude is adequate. The issue with taking the pulse from the right hand side of C1 is that it is clamped by the transistor BE junction.
r questions.:
-i have not measured it. I would answer to you soon.
b) Another question, can you insert a resistor between L1 and C1?
yes. What way it helps.