GB767997A - Improvements in or relating to differential electronic amplifiers - Google Patents

Improvements in or relating to differential electronic amplifiers

Info

Publication number
GB767997A
GB767997A GB24298/54A GB2429854A GB767997A GB 767997 A GB767997 A GB 767997A GB 24298/54 A GB24298/54 A GB 24298/54A GB 2429854 A GB2429854 A GB 2429854A GB 767997 A GB767997 A GB 767997A
Authority
GB
United Kingdom
Prior art keywords
screen
grids
cathode
grid
gas
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
GB24298/54A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB767997A publication Critical patent/GB767997A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F5/00—Amplifiers with both discharge tubes and semiconductor devices as amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/42—Amplifiers with two or more amplifying elements having their dc paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers
    • H03F3/44—Amplifiers with two or more amplifying elements having their dc paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

767,997. Automatic current control systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 20, 1954 [Aug. 24, 1953; Jan. 25, 1954], No. 24298/54. Class 38 (4). [Also in Groups XL (b) and XL (c)] In a push-pull amplifier (see Group XL (c)) comprising a pair of pentodes having a common cathode impedance of high value, discrimination-against in-phase voltages is increased by holding the screen-grids at a potential which is fixed relative to that of the cathodes. The common cathode impedance may comprise a pentode valve with a cathode resistor 16, Fig. 4, of relatively high value, the grid and screen-grid being supplied with positive potentials, via resistors 25, 25 respectively, which are stabilized by gas-discharge tubes 18, 19. In another embodiment the common cathode impedance comprises a pair of series-connected triodes 20, 21, Fig. 5, in series with a bias resistor 16, the grid potentials of which are stabilized by connection to a potentiometer across the H.T. supply comprising resistor 24 and gas-discharge tubes 22, 23, The screen-grids may be fed through a constantcurrent device comprising a pair of resistors 28, 29, Fig. 6, the screen-grids being also connected to a cathode-follower 26, the cathode of which is coupled to the join of resistors 28, 29 via a gasdischarge tube 27. In this device the cathode impedance of the valve 26 may comprise a cathode-degenerated triode, Fig. 7 (not shown). In a further modification a seocnd cathodefollower 32, Fig. 8, is provided with its grid connected to a gas-discharge tube 33 in the screengrid supply circuit. In another embodiment of the invention the screen-grids are fed through a constant-current device comprising a radiationcontrolled rectifier 37, Fig. 9. A gas-discharge tube 15 is connected between screen-grids and cathodes, while the common cathode impedance comprises a transistor 35 with its base electrode supplied with a substantially constant current via a series resistor 36.
GB24298/54A 1953-08-24 1954-08-20 Improvements in or relating to differential electronic amplifiers Expired GB767997A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL761298X 1953-08-24
NL329089X 1954-01-25

Publications (1)

Publication Number Publication Date
GB767997A true GB767997A (en) 1957-02-13

Family

ID=31980706

Family Applications (3)

Application Number Title Priority Date Filing Date
GB24297/54A Expired GB761298A (en) 1953-08-24 1954-08-20 Improvements in or relating to circuit-arrangements for amplifying electric signals
GB24298/54A Expired GB767997A (en) 1953-08-24 1954-08-20 Improvements in or relating to differential electronic amplifiers
GB2209/55A Expired GB771083A (en) 1953-08-24 1955-01-25 Improvements in or relating to electronic differential amplifiers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB24297/54A Expired GB761298A (en) 1953-08-24 1954-08-20 Improvements in or relating to circuit-arrangements for amplifying electric signals

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2209/55A Expired GB771083A (en) 1953-08-24 1955-01-25 Improvements in or relating to electronic differential amplifiers

Country Status (6)

Country Link
US (1) US2780682A (en)
BE (2) BE531370A (en)
CH (2) CH331260A (en)
DE (3) DE964331C (en)
FR (3) FR1106637A (en)
GB (3) GB761298A (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946016A (en) * 1954-10-26 1960-07-19 Lab For Electronics Inc All-pass network amplifier
GB839975A (en) * 1955-07-28 1960-06-29 Telephone Mfg Co Ltd Improvements in and relating to signal switched telecommunication circuits
US3085209A (en) * 1956-04-05 1963-04-09 Carlson Arthur William Wide-band differential amplification
US3111643A (en) * 1956-05-21 1963-11-19 Gilfillan Bros Inc Air traffic schedule monitoring method and system
DE1168974B (en) * 1956-07-03 1964-04-30 Telefunken Patent Transistor stage in emitter circuit with measures to compensate for the influence of operating voltage and temperature changes
US2909622A (en) * 1956-08-20 1959-10-20 Cons Electrodynamics Corp Direct current differential amplifying system
US2933693A (en) * 1957-05-03 1960-04-19 Lyle R Battersby Sensitivity control circuit
US2896031A (en) * 1957-10-15 1959-07-21 Epsco Inc Differential amplifier
US3125755A (en) * 1957-12-09 1964-03-17 Local
US3042876A (en) * 1958-01-30 1962-07-03 Statham Instrument Inc Differential transistorized amplifier
US3046487A (en) * 1958-03-21 1962-07-24 Texas Instruments Inc Differential transistor amplifier
US3024361A (en) * 1958-04-18 1962-03-06 Philips Corp Tuning and overload indicator circuit
US2941155A (en) * 1958-06-02 1960-06-14 Epsco Inc Differential amplifier
DE1120584B (en) * 1958-06-14 1961-12-28 Siemens Ag Arrangement for generating over long periods of highly stable control currents for Hall sensors
US3168709A (en) * 1960-12-14 1965-02-02 Honeywell Inc Stabilized transistor difference amplifier
NL277662A (en) * 1961-04-28
US3275944A (en) * 1963-11-26 1966-09-27 Bendix Corp High voltage d.c. coupled differential amplifier including series energized transistors
US3482177A (en) * 1966-10-03 1969-12-02 Gen Electric Transistor differential operational amplifier
US3541465A (en) * 1966-12-28 1970-11-17 Hitachi Ltd Transistor differential amplifier circuit
US3568081A (en) * 1968-09-09 1971-03-02 Honeywell Inc Differential amplifier with predetermined deadband
US3725807A (en) * 1970-08-31 1973-04-03 Westinghouse Electric Corp Direct current amplifier

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2358428A (en) * 1940-09-07 1944-09-19 Emi Ltd Thermionic valve amplifier circuit arrangement
US2329073A (en) * 1943-01-01 1943-09-07 Rca Corp Thermionic tube circuit
GB579685A (en) * 1944-04-24 1946-08-13 Hugh Lyon Mansford Improvements in or relating to thermionic amplifiers
US2624778A (en) * 1945-10-25 1953-01-06 Gilbert J Perlow Electronic fluxmeter and alternating current amplifier
FR963498A (en) * 1947-05-23 1950-07-11
US2594530A (en) * 1948-10-02 1952-04-29 Bell Telephone Labor Inc Amplifying system
US2592193A (en) * 1949-03-03 1952-04-08 Us Sec War Means for reducing amplitude distortion in cathode-follower amplifiers
US2631198A (en) * 1950-03-11 1953-03-10 Cons Electric Company Direct current amplifier
DE848207C (en) * 1951-02-03 1952-09-01 Fritz Schwarzer Push-pull reverse circuit for amplifier
DE853297C (en) * 1951-05-03 1952-10-23 Fritz Schwarzer Cascade amplifier in direct current coupling

Also Published As

Publication number Publication date
BE531370A (en) 1957-11-22
DE964331C (en) 1957-05-23
US2780682A (en) 1957-02-05
FR1118236A (en) 1956-06-01
FR1112775A (en) 1956-03-19
BE535111A (en) 1958-12-05
CH329089A (en) 1958-04-15
DE1023487B (en) 1958-01-30
GB771083A (en) 1957-03-27
GB761298A (en) 1956-11-14
DE971705C (en) 1959-03-19
CH331260A (en) 1958-07-15
FR1106637A (en) 1955-12-21

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