Current Sources and Voltage References: A Design Reference for Electronics Engineers
Current Sources and Voltage References provides fixed, well-regulated levels of current or voltage within a circuit. These are two of the most important “building blocks “ of analog circuits, and are typically used in creating most analog IC designs.
Part 1 shows the reader how current sources are created, how they can be optimized, and how they can be utilized by the OEM circuit designer. The book serves as a “must-have reference for the successful development of precision circuit applications. It shows practical examples using either BJTs, FETs, precision op amps, or even matched CMOS arrays being used to create highly accurate current source designs, ranging from nanoAmps to Amps. In each chapter the most important characteristics of the particular semiconductor type being studied are carefully reviewed. This not only serves as a helpful refresher for experienced engineers, but also as a good foundation for all EE student coursework, and includes device models and relevant equations.
Part 2 focuses on semiconductor voltage references, from their design to their various practical enhancements. It ranges from the simple Zener diode to today’s most advanced topologies, including Analog Devices’ XFET® and Intersil’s FGATM (invented while this book was being written). Over 300 applications and circuit diagrams are shown throughout this easy-to-read, practical reference book.
* Discusses how to design low-noise, precision current sources using matched transistor pairs.
* Explains the design of high power current sources with power MOSFETs
* Gives proven techniques to reduce drift and improve accuracy in voltage references.
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4 Using BJTs to Create Current Sources
5 Using Precision Matched Pairs Duals and Quads
6 Using JFETs and CRDs to Create Current Sources
7 Creating MediumPower Current Sources with DMOS FETs
8 Creating Current Sources with Power MOSFETs
11 Creating Precision Current Sources with Op Amps and Voltage References
12 An Introduction to Voltage References
13 The zener Diode and the TC zener Reference
14 Characteristics of Monolithic Voltage References
15 A Review of Some Outstanding Monolithic Voltage References and Their Applications
A References and Tables
9 Using Analog CMOS Arrays to Create Current Sources
10 Using Monolithic IC Current Sources and Mirrors
D Contact Information
adjustment amp’s amplifier Analog Devices applications approximately bandgap reference bandgap voltage reference bipolar Bob Widlar buffer buried-zener capacitance capacitor cascode characteristics CMOS collector compensation create current mirrors current sink current source data sheet depletion-mode diode’s DMOS FET drain current drift electrons emitter enhancement-mode equation example Fairchild Semiconductor gate higher IDSS initial accuracy JFET JFET’s junction Kelvin connections leakage current less Linear Technology load current low-noise low-voltage lower manufacturers matched-pairs maximum N-channel National Semiconductor noise level operating temperature range output current output impedance output voltage power MOSFET precision current precision op amp precision resistor quad quiescent current reference voltage reference’s resistance resistor shown in Figure shunt reference silicon specified specs stability supply voltage surface-mount surface-mount package Table tempco thermal today’s transistor trim trimmer types typically ultra-low volts Widlar XFET zener diode µV pk-pk