Matching in Analog Layout
WEBMay 20, 2014 · One common matching technique is known as common centroid. In this case, two devices to be matched are split into several fingers and placed in a pattern, as shown in Figure 1. The key points are that the centroids of each device should coincide, the devices should be symmetrical, their orientation should be …
Using Deep N Wells in Analog Design
WEBMay 7, 2015 · In summary, the use of deep N well devices can significantly reduce noise coupling between sensitive analog areas and more noisy digital regions in mixed-signal designs. ESSDERC 2012. Analog layout: Why wells, taps, and guard rings are crucial. Automating Analog Layout. Additional structures in analog layout beyond schematic.
Peak Detector: A Classic Analog Circuit Still in Wide Use
WEBDec 5, 2013 · A relative of the peak detector is the crystal (diode) radio, which uses a diode to demodulate (detect) a basic amplitude-modulated broadcast signal; see Figure 3. Figure 3. The venerable crystal radio circuit is a self-powered envelope detector, and a precursor of the peak detector. This circuit is an envelope detector that tracks the overall ...
The Basics of SerDes (Serializers/Deserializers) - Planet Analog
WEBSep 16, 2010 · In a serial bus, a device called SerDes (Serializer/ Desrializer) is used to transmit and receive data over the serial link. In essence, a SerDes is a serial transceiver which converts parallel data into a serial data stream on the transmitter side and converts the serial data back to parallel on the receiver side.
Planet Analog - All Signal No Noise
WEB4 days ago · 2021 (119) 2020 (44) Planet Analog provides an online community for semiconductor and system designers/engineers interested in advancing analog design techniques.
ADC Guide, Part 12: Input Configurations; Single-Ended
WEBMar 12, 2013 · Differential ADC. The primary advantage of differential ADCs is high common-mode noise immunity compared to single-ended ADCs. This noise immunity is due to: 1) the same noise being coupled on both the inverting and non-inverting input signals of the ADC; and 2) this noise is rejected by common-mode rejection capabilities of the differential ADC.
An Analog Tutorial: Current sources - Planet Analog
WEBMar 28, 2019 · Figure 3. The Wilson Current Source is another three-transistor architecture current source. All transistors are identical (this is easy in an IC on a monolithic substrate) (See Reference 3) Adding another transistor (T4) will improve the accuracy and dynamic range of the current source as seen in Figure 4. Figure 4.
Layout Dependent & LOD Effects in Analog Design
WEBOct 9, 2014 · This stress affects carrier mobility in the devices and, hence, current. This is known as “length of diffusion” or LOD effect, where the characteristics of a device vary according to the distance of its gate from the diffusion edge. To design with LDE effects, various layout techniques can be used: Use similar diffusion size, shape ...
IC Performance: Challenges in Layout with CMOS Technology Nodes
WEBFeb 14, 2017 · Besides the known benefits of advanced CMOS technology nodes, which are moving towards the ultra-small nanometer range, the layout work for mixed-signal circuits is becoming more and more challenging. Several challenges, which were quite tamed in earlier technology nodes, are coming up as a bottleneck for design performance and robustness in ...
Buffer Amplifiers: Design & Applications - Planet Analog
WEBMay 7, 2018 · The x1 voltage amplifier or “buffer” is a standard building block of analog design. This article presents the design of a discrete, low-parts-count, high-performance, matched-transistor buffer, and covers some of the finer points in optimizing its design. In an era when a buffer is most easily implemented with an op-amp, why use a discrete ...