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.
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 ...
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 ...
Analog rankings: Top 10 suppliers own 68% market share
WEBJun 8, 2022 · The report shows that the top-10 analog suppliers collectively accounted for 68% of analog sales in 2021. And six of the top 10 analog companies are based in the United States. Europe’s three major IC suppliers—Infineon, NXP, and ST—were among the top 10 analog suppliers in 2021, and they collectively accounted for 16% of the global ...
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.
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.
Operational Transconductance Amplifier (OTA) - Planet Analog
WEBAug 17, 2022 · Operational transconductance amplifiers (OTAs) have become essential building blocks of many modern analog and mixed signal circuits. OTAs are used as a key element in a wide variety of circuits that benefit from voltage control. In essence, an OTA is a direct-coupled differential voltage-controlled current source (DVCCS) with high output ...
Matching in Analog Layout - Planet Analog
WEBMay 20, 2014 · Matching in Analog Layout. Analog circuits often use structures like differential pairs and current mirrors, where the matching of device characteristics such as the threshold voltage V t is important. Circuits using these structures with device threshold differences of a few millivolts or less can determine the performance and yield of a design.
Analog layout: Why wells, taps, and guard rings are crucial
WEBAug 23, 2021 · An N-well is constructed around and beneath the device’s P-well. The N-channel device operates in the P-well. Both the P-well and the deep N-well need to be tapped, but in many cases, both wells are protected with guard rings. This means that the device has two rings around it, greatly improving the isolation of …
Old-School Analog Temperature Control Circuits Solved with …
WEBFeb 21, 2017 · Part one: NE555 Maintains Dynamically SPICE-Generated System Temperature Within the Limits. A few months back, a dynamic voltage-controlled thermistor SPICE model was presented on planet analog, A Multi-Simulator NTC Thermistor SPICE Model With Temperature Driven By a Voltage With the help of this model, we intend to publish a series of technical notes about the LTSpice modelling of several ...