JFET iPod preamplifier

The next stage operates in conjunction with the first stage and is fully complementary. A cascode circuit is included to enhance the linearity of the amplifiers. This cascode circuit requires a constant reference voltage for biasing to activate the...

An ultra low noise audio preamplifier particularly suited to microphone preamplification including balanced microphones. The IC features wide bandwidth, low distortion only 0.007% at a gain of 100, and very low noise only 1.3nV/Hz for source impedance up to...

Preamplifier and tone control circuit based on the TDA1524A. The tone control circuit module is included in this preamplifier circuit, allowing for direct connection of the output channels to a stereo power audio amplifier circuit. This RIAA stereo preamplifier...

12AU7 (ECC82) Cathode Follower Tube Preamplifier Schematic. This is a two-stage 12AU7 preamplifier featuring a low impedance output stage. The overall gain is approximately 8 times. The 12AU7 (ECC82) tube is a dual triode commonly used in audio applications due...

The circuit presented is a three-input microphone mixer and preamplifier utilizing the LM348 integrated circuit. The LM348 is a high-gain, internally compensated quad operational amplifier featuring a class AB output stage. It has a very low input supply current...

This device, available in a Stainless DIL 8 package, is capable of measuring four independent analog voltages ranging from 0 to 5 volts. It transmits the measurement results as four characters via a standard asynchronous serial link. The described device...