January 2014
Intermediate to advanced
567 pages
23h 13m
English
Content preview from Principles of Analog Electronics
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Ampliers: Variants
497
Curiosity
Serial data transmission can use the known protocols known as RS422 or
RS485.These protocols are based on differential techniques of transmission, to
reject a considerable amount of common-mode noise.
The emitter resistor R
E
, also called a long-tail resistor, can be usefully replaced
by an active current source (Section 13.1.2) to improve the overall CMRR value.
13.5 KEY POINTS, JARGON, AND TERMS
➜ The amplier’s input resistance can be increased utilizing a Darlington pair,
a current source, or a bootstrapping technique.
➜ A Darlington pair consists of two transistors connected in a way that the
base of the second ...
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