DBS-20-type leakage protection circuit

A VU (Volume Unit) meter has traditionally been a key component of audio metering systems. The Peak Program Meter (PPM) is known for its inadequacy in accurately displaying peak signal levels. This circuit serves the same function as previously...

This circuit utilizes one-quarter of an LM3900 to create a simple variable-gain front end for an oscilloscope. R7 serves as the gain control. Additionally, a basic preamplifier is included for applications requiring more than 10X gain. The circuit employs the...

When power is first applied to the circuit, capacitor C2 begins to charge through LED1, resistor R3, and resistor R4. When the voltage across C2 reaches the input trigger level of operational amplifier U1, the output at pin 6...

This circuit illustrates the high and mid-frequency sections of a car radio. The medium wave band I operates within the frequency range of 520 to 950 kHz, while Poland II operates between 900 and 1640 kHz. The circuit employs...

The AM radio features a monolithic circuit design. The broadcast signal is received by an antenna, which feeds into a high-efficiency mixer. The output from the intermediate frequency (IF) transformer undergoes filtering before being sent to the IC1. The...

This simple FM radio receiver circuit utilizes the TDA7000 integrated circuit (IC), which incorporates nearly all the necessary functions to construct an FM receiver, requiring only a few external capacitors and a tuning circuit. The design employs a straightforward...