Analog integrated circuit mainly refers to an integrated circuit composed of capacitors, resistors, transistors, etc., which are integrated together to process analog signals. There are many analog integrated circuits, such as operational amplifiers, analog multipliers, phase-locked loops, and power management chips. The main components of analog integrated circuits are: amplifiers, filters, feedback circuits, reference source circuits, switched capacitor circuits, and so ON.
Analog integrated circuit mainly refers to an integrated circuit that is used to process analog signals by integrating analog circuits composed of capacitors, resistors, and transistors. There are many analog integrated circuits, such as operational amplifiers, analog multipliers, phase-locked loops, and power management chips. The main components of analog integrated circuits are: amplifiers, filters, feedback circuits, reference source circuits, switched capacitor circuits, and so ON. Analog integrated circuit design is mainly obtained through manual circuit debugging and simulation by experienced designers. The corresponding digital integrated circuit design is mostly generated automatically by using hardware description language under the control of EDA software.
Integrated circuits (ICs for short) can be divided into two categories: digital ICs and analog ICs according to their functions and structures. Digital IC is used to generate, amplify and process a variety of digital signals (referring to discrete changes in time and amplitude. For example, VCD, DVD playback audio signal and video signal) circuit. Analog IC is a circuit used to generate, amplify and process various analog signals (signals whose amplitude changes continuously over time). It is one of the core technologies of microelectronics technology. It can collect, amplify, and amplify analog quantities such as Voltage or current. Comparison, conversion and modulation.
The basic circuits of analog integrated circuits include current sources, single-stage amplifiers, filters, feedback circuits, current mirror circuits, etc. The higher-level basic circuits composed of them are operational amplifiers, comparators, and higher-level circuits have switches. Capacitor circuit, phase locked loop, ADC/DAC, etc. According to the response relationship between output and input signals, analog integrated circuits can be divided into Linear integrated circuits and nonlinear integrated circuits. The response between the output of the former and the input signal is usually Linear, and the output signal shape is similar to the input signal, but it is amplified and amplified by a fixed coefficient. The response of the output signal of the nonlinear integrated circuit to the input signal shows a nonlinear relationship, such as a square relationship, a logarithmic relationship, etc., so it is called a nonlinear circuit. Common non-linear circuits include oscillators, timers, and phase-locked loop circuits. The typical application of analog integrated circuit is shown in the figure below. Input the external natural signal collected by various sensors or antennas such as temperature, humidity, optics, piezoelectric, acousto-electricity, etc., after preprocessing by the analog circuit, it is converted into a suitable digital signal to In a digital system; the signal processed by the digital system is post-processed by an analog circuit and converted into analog signals such as sound, image, and radio waves for output.