JFET iPod preamplifier

The mixer is the common "virtual earth" mixing amplifier, and there is nothing special about it. Note that it is inverting, which complements the tone controls (also inverting) so the absolute signal polarity is maintained. As shown, the mixer...

This is a specialized low-voltage version of an audio preamplifier. The emitter voltage of transistor T1 is biased close to half the supply voltage (1.5V) to enable maximum output voltage swing. Both transistors are directly coupled and utilize closed-loop...

The preamplifier circuit utilizes the 5533 chip and incorporates a combination of balance and volume controls. Given the nonlinearity of the human auditory system, low frequencies are required to be amplified at lower listening levels. Additionally, level and LOUDNESS...

The schematic illustrates the JFET-Bipolar Cascode Circuit Diagram, designed to deliver full video output for the CRT cathode drive. The circuit achieves a gain of approximately 90. It consists of a two-stage amplifier that includes a transconductance amplifier followed...

This amplifier is designed to be integrated with preamplifiers that lack a phono input. A phono input is essential for standard record players equipped with dynamic pick-ups, which remain widely used. The amplifier not only elevates the output of...

This is a simple microphone preamplifier circuit designed for use between a microphone and a stereo amplifier. This circuit is compatible with standard home stereo amplifier line, CD, aux, and tape inputs. It can accept both dynamic and electret...