Analog Multiplexer (CB21250E)

This low impedance circuit was found in an Electronic Design from the 90's. Operational amplifiers admit equivalents.

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1.2 GHz Oscillator (CB19070E)
This circuit was found in a 1966 publication using a microwave transistor of the time. The circuit...
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The integrated circuit used in this application is the National Semiconductor's LM2907, the...
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This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...