Automotive tachometer (CB7107E)

We found this circuit in an American documentation from the 90s. The circuit applies to vehicles with contact breaker.

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Negative voltage converter (CB20669E)
We found this circuit in a Maxim documentation from the 90s. This circuit provides a negative...
Precision PWM Generator (CB21335E)
This circuit was obtained from an Electronic Design from the 90's. The circuit generates signals at a...
Sine to Square Converter (CB6592E)
Found in a 1964 Electronic Design this circuit makes use of components of the era. The output is 2 V...