Nowadays, the mainstream down conversion receiving method is mainly if receiving technology. Specifically, the RF signal is first transformed into IF signal, and then transformed into baseband signal for processing. Direct sampling of RF signals is technically difficult to achieve, and the cost is not cost-effective. In the current research of conversion, most applications are […]
Category: Simulation Technique
Types, principles, application characteristics and Simulation of multivibrator
introduction Multivibrator is often used in digital system circuits. Multivibrator is a self-excited oscillator. After the power is turned on, it can generate a rectangular wave with a certain frequency and width without adding a trigger signal. This output waveform is used as the clock signal source in the circuit. Because the rectangular wave contains […]
Based on TSMC 0.25 μ Design of ADC sample and hold circuit based on M CMOS process
introduction In recent years, with the rapid development of digital signal processing technology, digital signal processing technology is widely used in various fields. Therefore, as a bridge between analog and digital systems, the performance of analog-to-digital converter (ADC) is also put forward higher and higher requirements. Low voltage high-speed ADC is a key part in […]
Research on new DPGA device based on divergence exponential curve
DPGA (digital programmable gain amplifier) is a practical signal processing element, which is applied when analog-to-digital converter must obtain signals in a wide dynamic range. If the input signal amplitude cannot be accommodated to match and effectively utilize the analog-to-digital converter span, the low input may not be digitized with sufficient resolution, and the high […]
Basic logic operation and its circuit implementation
Experimental principle In logical algebra, there are three basic logical operations: and, or and not. As shown in Figure 1, the control circuit of three indicator lights is given. In the circuit of Fig. 1 (a), the indicator light will be on only when two switches are closed at the same time. This causal relationship […]
Study on the function of loop gain t in operational amplifier and its influence on circuit stability
introduction Most operational amplifier circuits work in the deep negative feedback state. When analyzing such circuits, we often use the idealized model of operational amplifier (i.e. using virtual short virtual break Technology). In fact, this idealized model ignores the impact of the open-loop gain of operational amplifier and the non idealization of input and output […]
Characteristics and application design of 14 bit high performance broadband analog-to-digital converter ad6655
1 Introduction With the rapid development of mobile communication services, repeater, as an important equipment to improve the signal weak area and blind area of mobile network, is widely used in 2G mobile network because of its advantages of less investment, simple structure, convenient and flexible installation and so on. At present, the 2G network […]
Application characteristics and advantage analysis of Ti 32-bit incremental cumulative analog-to-digital converter
Review: Recently, Texas Instruments (TI) launched a pair of 32-bit incremental cumulative analog-to-digital converters (ADCs). These two devices combine high resolution, low noise and integrated fault detection, which successfully solved the problem that the required performance and characteristics could not be obtained in the past when evaluating and selecting devices. In addition, ads1262 and ads1263 […]
Performance characteristics and application of boost DC / DC converter lt8494
Review: July 16, 2015 – Linear Technology Corporation introduced a current mode, fixed frequency SEPIC / boost DC / DC converter lt8494 with an internal 2a, 70V switch. The ultra-low quiescent current of only 7 µ a makes the device very suitable for automotive or other industrial battery power supply systems that remain on all […]
ADI AD7175-2 Σ-Δ ADCs provide industry-leading noise performance
Review: Analog devices, Inc. introduces the industry’s first fully integrated true rail to rail input buffer Σ-Δ With a throughput rate of 250 ksps, it can provide designers with industry-leading noise performance. Ad7175-2 (ad7175-2 Data Book) Σ-Δ Type ADC has 24 noise free bits at 20sps and 17.2 noise free bits at 250ksps, which provides […]