Long times with DI3T1 (CB21422E)

This PUT circuit was found in a 1967 General Electric SCR manual. The basic component is unusual, and the capacitor must be low-leakage.

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Digital Voltmeter (CB18145E)
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CMOS Amplifier +1 and -1 Gain (CB15751E)
The interesting circuit shown in the figure, can have its gain digitally controlled and present two...
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