NDLI: Design of integrated analog CMOS circuits-a multichannel telemetry transmitter [single-stage differential amplifier]

Content Provider	IEEE Xplore Digital Library
Author	Steinhagen, W. Engl, W.L.
Copyright Year	1966
Description	A single-stage differential amplifier, implemented in a standard metal-gate process, serves as a basis for consideration of specific characteristics of analog CMOS circuits. The dependence of important circuit parameters like open-loop gain and gain-bandwidth product on transistor geometries, and biasing current are derived. Furthermore, it is shown how to improve the amplifier characteristics by optimizing the layout. The differential amplifier stage is compared with an equivalent one based on a standard bipolar process. This comparison shows that the CMOS stage exceeds in the low-current region (nanoamperes) not only the possible voltage gain but also the gain-bandwidth product of a bipolar stage. The results are applied to the design of a multichannel telemetry transmitter for patient monitoring. The transmitter chip incorporates a digital part for the multiplex control and a precise analog part for the modulation unit. The modulator is a voltage controlled oscillator and consists of two parts: a voltage-to-current converter and a current controlled oscillator. The linear range of the voltage-to-current converter is limited to at most three decades due to the offset of MOS transistors. The current controlled oscillator, however, has a linear range of more than seven decades. This was made possible by applying a new design principle, which is specific for CMOS technology. Besides the large linear range the multivibrator has excellent temperature stability. The chip area is 4 mm/SUP 2/.
Sponsorship	IEEE Solid-State Circuits Society IEEE Electron Devices Society IEEE Circuits and Systems Society Japan Society of Applied Physics (JSAP) IEEE Microwave Theory and Techniques Society IEEE San Francisco Section Bay Area Council Univ. PA IEEE
Starting Page	799
Ending Page	805
Page Count	7
File Size	1066480
File Format	PDF
ISSN	00189200
Volume Number	13
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1978-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	CMOS analog integrated circuits Telemetry Transmitters Differential amplifiers Voltage-controlled oscillators Voltage CMOS technology CMOS process Geometry Patient monitoring
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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