The integrated circuit used in this amplifier is not very common today. This amplifier was found in the 1977 National Semiconductor Audio Handbook. The power source must be at least 500 mA.
This circuit is from a June 1953 Radio Electronics. It includes the modulation oscillator with a...
This circuit is from a 1995 Electronics Now. The sensor is a 10k to 220k NTC. R2 must have the...
In the figure we have the simple way to obtain an integrator with an operational amplifier of type...