DISCO design specification (1)

The Ministry of Culture of the People's Republic of China has promulgated two standards: "Acoustic Characteristic Indexes and Measurement Methods for the Sound Reinforcement

[Photo] 0.8W 21MHZ CW QRP transmitter

Remote automatic rainfall monitoring network based on GPRS

Remote automatic rainfall monitoring network based on GPRS

Abstract : This article introduces a new type of wireless automatic rainfall monitoring network. The network breaks through the weaknesses of traditional autom


TDA89220 is a Class D (switching type) power amplifier IC produced by Philips. The device integrates analog circuits, digital circuits and t

The main parameters that characterize the performance of the antenna are the pattern, gain, input impedance, standing wave ratio, polarization mode, etc.

In this article, the EL34 and transistor (op amp) are cleverly combined, and the result is unexpected and high performance. This 32W power amplifier has a full power bandwidth of 5Hz

Ultra-long-range high-fidelity reception of FM broadcast

Ultra-long-range high-fidelity reception of FM broadcast

The reception of FM broadcasts has been a hot topic in recent years, especially last year. This is because FM broadcasts have better sound quality, higher fidelity, stronger anti-interference, and richer

TV display processor TDA9332H controlled by I2C bus and its application

Abstract: TDA9332H is a display processor suitable for high-end color TVs produced by Philips. It can be used for single-scan (50 or 60 Hz) and dual-scan (100 or 120 Hz) TV signal processing. The article introduces the structure principle and performance characteristic