This circuit was found in Texas Instruments documentation from 1968. The transistors are from that time, admitting modern equivalents. The response ranges is from 20 to 20 000 Hz.
This TTL decoder circuit for PC ports was found in a document from 1992. The power supply can be...
This very low Power oscillator uses a neon lamp as active element. Frequency is given by C1 and...
This circuit modifies the logical level of a digital function by switching to TTL, for example....