JFET Common Source DC Amplifier Temperature Compensation
- From: D from BC <myrealaddress@xxxxxxxxx>
- Date: Mon, 19 Nov 2007 14:01:55 -0800
My app uses a JFET..
What are some ways to temperature compensate a common source JFET DC
amplifier.
Vdd=5V
|
10K
|
+------------Vout (biased for 50% Vdd)
|d
signal--->[ N JFET
|s
|
Gnd
'DC' amplifier.
Details:
1) The signal does contain a stable bias voltage.
2) Temp range: 20C to 50C
3) Vout thermal error of +/-10mVdc.
4) BW: DC to 2Mhz
I'm guessing compensation by:
1) PTC or NTC resistor
2) Use another JFET and feed in anti drift.
3) Find a special jfet (IC??) << not an op amp!
Possible ??
D from BC
.
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