This circuit was found in an Electronics World of 1966. It has a range of 5 to 25 000 Hz at 1 dB and the diagram includes the power supply.
The time constant of this circuit is 100 x R1 x C1, which leads to the possibility of obtaining times...
This power supply makes use of a capacitance multiplier. C2 can be 100 uF which with the action of...
This AC amplifier using the 741 operational amplifier uses a dual supply from 5 to 12 V. The input...