Temperature to frequency converter (CB7325E)

This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit that is not common today.

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3-Transistor Radio (CB21641E)
Found in the July 1968 Supertena Bulletin of a Popular Electronics, this receiver makes use of the...
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This switching source was obtained in a 1976 National Semiconductor manual. For the indicated...
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