Keyboard Hexadecimal Encoder (CB13763E)

We found this CMOS circuit in a 1978 publication. It allows you to use a standard calculator keyboard with 16 keys for encoding in hexadecimal.

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CMOS Clock (CB11929E)
This circuit generates rectangular clock signals for CMOS applications. The capacitor can have...
Logarithmic Amplifier (CB25762E)
This logarithmic operational amplifier was found in the September 1994 issue of Electronics Now...
Low Voltage Triac Control (CB12240E)
In the figure we have the way to control a triac of the TIC series with a low voltage through a...