Picoammeter (CB6192E)

This circuit was found in a 1980s Intersil documentation. The integrated circuit used is not common today. The power supply must be symmetrical.

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Current Monitor LT1789 (CB5224E)
This High Side Current Monitor was found in a 2005 Linear Technology White Paper. The circuit...
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This circuit doubles the pulse rate produced by a digital TTL circuit. The circuit is from a 1976...
Variable Frequency Oscillator (VFO) (CB13087E)
The Variable Frequency Oscillator (VFO) shown in the figure can generate signals in a frequency range...