Using Deep N Wells in Analog Design
May 7, 2015 · In this case, the deep N well is formed by a high energy ion implantation to give peak impurity concentration deep enough to un-affect the NMOS device performance 1.Connection to the deep N well is formed by a N well ring that is connected to VDD.
Layout Dependent & LOD Effects in Analog Design
Oct 9, 2014 · Analog designers have always had to worry about physical layout to get good matching of devices. Variations in doping levels across the chip, usually assumed to be in a gradient in one or two dimensions, could be handled by …
Operational Transconductance Amplifier (OTA) - Planet Analog
Aug 17, 2022 · Planet Analog Explores Operational Transconductance Amplifiers (OTA), Compares OTA vs. OP Amps, and Offers Practical Applications & Examples.
The Basics of SerDes (Serializers/Deserializers) - Planet Analog
Sep 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.
Matching in Analog Layout
May 20, 2014 · 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.
The basics of 4-20mA current loop transmitters - Planet Analog
May 5, 2016 · Editor’s note: This month we are pleased to have Colin Wells from Texas Instruments as our blogger. In modern industrial control systems, 4-20 mA current-loop transmitters remain one of the most common methods for transmitting data between control centers and sensors/actuators in the field.
Peak Detector: A Classic Analog Circuit Still in Wide Use
Dec 5, 2013 · This circuit is an envelope detector that tracks the overall modulated signal shape (a.k.a. envelope) — the information-bearing part of the signal — while ignoring the much higher-frequency carrier waveform.
An Analog Tutorial: Current sources - Planet Analog
Mar 28, 2019 · James Bryant, retired Analog Devices ‘guru’ says, “…current outputs offer advantages in a number of situations, including analog current-loop signaling (0 mA to 20 mA and 4 mA to 20 mA) in high-noise environments, and level shifting an analog signal across a large potential difference without the use of optical or magnetic isolation techniques.” (See Reference 4)
Buffer Amplifiers: Design & Applications - Planet Analog
May 7, 2018 · On the above plot, v L0 = 5.3 V. Though the power dissipation is matched at this output voltage, any change around this value causes a larger change in Δ p D than the same change in v L around v L (max). Consequently, the preferred bias point is at v L (max).. On the plot, v L (max) = 1.62 V. However, the given circuit parameters result in a static v L of 0 V instead.
Latchup Prevention In CMOS - Planet Analog
Jan 14, 2015 · Amrutah, Good question. Lower supply voltages help because the turn on voltage for the lateral parasitics is pretty independent of scaling – but there are many variables involved, like the distance of the base region of the parasitics (which decreases, hence potentially higher gain) and the resistance of the well/substrate etc.