This amplifier for hearing aid was found in a 1968 documentation using an integrated of the time. The power is from a battery, the consumption of 1.65 mA and the power of about to 1 mW.
This circuit was found in the RCA Power Transistor manual from the 70's. The circuit uses power...
This circuit was found in an American documentation from the 90s. It consists of an optical memory...
CMOS 4046 (PLL) is not very common. In this circuit it generates short pulses to excite a high...