In the receiver, because the IF frequency is low and the frequency is fixed, it is easy to obtain high gain and provide large enough input for the next stage, so the if amplification circuit is widely used. However, the strength of the radio signal varies greatly. The IF amplifier itself also has a certain […]
Articles Tagged: amplifier
The composite amplifier based on ad8253 meets the design requirements
Although binary is mainly used in electronic technology, decimal number is widely used in human-computer interaction. Therefore, the design usually needs to use a gain programmable amplifier with a gain to the power of 10. At present, the ad8253 monolithic instrument amplifier of anolog devices is digitally programmable when the voltage gain is 1, 10, […]
Application analysis of signal-to-noise ratio in circuit design of digital communication system
introduction In the digital communication system, the received signal-to-noise power spectral density ratio (PR / N0), the received bit energy to noise power spectral density ratio (EB / N0), and other similar signal-to-noise ratio (SNR) are often not accurately defined at the input point of the receiving circuit. This inaccuracy comes from some common uncertainties, […]
The mixer function is integrated with the amplifier to adjust the conversion gain
In many applications, the frequency conversion stage includes a buffer, preferably with some additional voltage gain; One mixer; There are also some filters. You can simply integrate the mixer function with the amplifier, thus eliminating the amplifier in front of the mixer. A low-cost solution is to use an amplifier with power down disable function. […]
Wien bridge oscillator circuit using ha2541 amplifier
BAIDU_ CLB_ fillSlot(“365525”); label:Vickers bridge (1)HA2541(1)Oscillator circuit (1)Amplifier (1) The Wien bridge oscillator circuit using ha2541 amplifier can produce high-quality and 40 Hz ~ 50 Hz sine waves.
Chopper technology based on noise gain can improve dc accuracy
One of the most important indicators of operational amplifier is its input offset voltage. This voltage can be ignored for many operational amplifiers, but the problem is that the offset voltage will change with temperature, flicker noise and long-term drift. Chopping and automatic zeroing techniques have been available for many years, which can reduce the […]
How to solve the interaction between threshold and lag by using Precision Comparator
Comparator is a widely used circuit element. In many cases, such as square pulse shaping circuit, the accuracy of voltage comparison is not very critical, and the voltage value can change in the range of hundreds of millivolts without affecting the circuit performance. However, many applications require very accurate voltage comparison, and these voltages require […]
Performance characteristics and application design analysis of class D digital audio amplifier max9700
introduction Maxim’s class D digital audio amplifier max9700 has considerable advantages in efficiency compared with linear Audio Amplifiers (such as class A, class B and class AB). For linear amplifiers (such as class AB), the linear operation of bias elements and output transistors will lose a lot of power. The transistor of max9700 is only […]
Using high gain operational amplifier to realize the design of measurement amplifier and improve performance index
Measurement amplifier, also known as instrument amplifier or data amplifier, is a high-precision amplifier that can be used to amplify weak difference signal. It has a wide range of applications in measurement control and other fields. Generally, the measurement amplifier is mostly realized by special integrated module. Although it has high performance index, it is […]
Design of low noise amplifier circuit based on CMOS LNAs device
1 Introduction At present, GaAs MESFET LNAs are widely used in the RF frequency band up to several GHz. Its advantage is that it can reduce the noise figure to about 1 dB while the power gain is up to 20 dB. However, with the maturity of CMOS circuit technology, there are more and more […]