This circuit was found in Ferranti's 1974 transistor manual. The transistors are from the period and the frequencies generated are between 50 Hz and 2 kHz.
We found this circuit in an American documentation of the 80's, being indicated for the test of...
This amplifier for instrumentation with differential input is from the factory manual of the...
This circuit is from old technical documentation, used to monitor the voltage of a 12 V battery. The...