Auto Bias for FET (CB6125E)

This configuration is from a 1964 US documentation valid for any FET. The range of power voltages depends on the application.

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NO and NC sensors Alarm (CB24139E)
This circuit, with printed circuit board included, is from a Radio Electronics magazine from July...
Pass Through Alarm (CB15919E)
In the figure we show how to excite a CMOS port by interrupting light on a Darlington...
Voltage Selector (CB16447E)
We found this circuit in an old documentation, but it uses components that are still common in our...