The following schematic is a simple Field Effect Transistor Cascode Video Amplifier. It has some features, and able to reduce the feedback to almost zero and very low input loading. This schematic uses 2N3823 IC as it has high Yfs and low capacitance. RL and load capacitance limits bandwidth of the amplifier. Here is the [...]
The following schematic diagram is a HI-FI tone control circuit with high Z input. This is useful for controlling the HI-FI tone. To buffer op-amp controlled feedback type tone control circuit, this schematic applies 2N3684 JFET. The 2N3684 JFET is applied on this circuit because it has low noise features and offers the function of [...]
Random noise origin is often involved in examining many case of electronic systems such as filter, sound, or RF communication. The electrical circuit introduced here gives an RMS amplitude modulated noise source with selectable bandwidth. With 1 KHz to 5 MHz decade ranges selectable bandwidth and 300mV RMS output, this noise generator is appropriate for [...]
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