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 uses a Norton operational amplifier to generate 1 kHz pulses with a 1 to 60...
The figure shows how to use a CMOS amplifier as a crystal-controlled oscillator. The circuit is...
The purpose of the circuit shown in the figure, obtained from a 1972 documentation, is to delay the...