Does the analog electronic circuit include low frequency and high frequency parts?

Generally speaking, analog electronic circuits refer to low-frequency electronic circuits. The high frequency part of analog electronic circuit is called high frequency electronic circuit.

Analog electronic circuits include semiconductor materials, devices (diodes, triodes, field effect transistors) and their basic circuits, power amplifiers, integrated operational amplifiers and their application circuits, negative feedback amplifiers, DC regulated power supplies and electronic circuits.

High-frequency electronic circuit is an important professional basic course for electronics and communication technology specialty, which mainly includes: high-frequency small signal amplifier, high-frequency power amplifier, sine wave oscillator, amplitude modulation, detection and mixing, angle modulation and demodulation and feedback control circuit.