UST953012I4 - Current amplifier - Google Patents

Current amplifier Download PDF

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Publication number
UST953012I4
UST953012I4 US05/639,405 US63940575A UST953012I4 US T953012 I4 UST953012 I4 US T953012I4 US 63940575 A US63940575 A US 63940575A US T953012 I4 UST953012 I4 US T953012I4
Authority
US
United States
Prior art keywords
base
cma
effects
transistor
current amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
US05/639,405
Inventor
Jonathan Samuel Radovsky
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Priority to US05/639,405 priority Critical patent/UST953012I4/en
Application granted granted Critical
Publication of UST953012I4 publication Critical patent/UST953012I4/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/26—Current mirrors
    • G05F3/265—Current mirrors using bipolar transistors only

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)

Abstract

in a current mirror amplifier (CMA) circuit the desired gain may not be realized because of the effects of the base currents of the transistors comprising the CMA. A resistance of appropriate value is added in series with the base of a transistor in the input path thereby varying the base-emitter junction voltage of an output current determining transistor in the CMA output path which in turn modifies this output current in a manner so as to reduce the effects of the base currents.
US05/639,405 1975-12-10 1975-12-10 Current amplifier Expired UST953012I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/639,405 UST953012I4 (en) 1975-12-10 1975-12-10 Current amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/639,405 UST953012I4 (en) 1975-12-10 1975-12-10 Current amplifier

Publications (1)

Publication Number Publication Date
UST953012I4 true UST953012I4 (en) 1976-12-07

Family

ID=24563955

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/639,405 Expired UST953012I4 (en) 1975-12-10 1975-12-10 Current amplifier

Country Status (1)

Country Link
US (1) UST953012I4 (en)

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