GB1519456A - Wideband amplifier arrangement - Google Patents

Wideband amplifier arrangement

Info

Publication number
GB1519456A
GB1519456A GB4336274A GB4336274A GB1519456A GB 1519456 A GB1519456 A GB 1519456A GB 4336274 A GB4336274 A GB 4336274A GB 4336274 A GB4336274 A GB 4336274A GB 1519456 A GB1519456 A GB 1519456A
Authority
GB
United Kingdom
Prior art keywords
path
amplifier
output
input
equal
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
GB4336274A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB4336274A priority Critical patent/GB1519456A/en
Publication of GB1519456A publication Critical patent/GB1519456A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

1519456 Amplifiers POST OFFICE 18 Sept 1975 [7 Oct 1974] 43362/74 Heading H3T A wideband amplifier using feed-forward to improve linearity, comprises first and second input paths in parallel, the first path having an amplifier 5, 6, and the second path having a passive impedance 13 in series with a delay line 14, an attenuator 10 coupling an output from the first path to produce at the output of the second path 16 an error signal proportional to the non-linearity of the amplifier 5, 6, an error amplifier 17, 18 connected to receive the error signal, and another output 21 from the first path including a passive impedance 22 and a delay line 23, being coupled with the output of the error amplifier to produce an output corrected for non-linearity. The delay line 14 compensates for the delay of 5, 6 and 10 etc so that the delays from input 1 to 16 along each path are equal, the capacitor 13 being added in order to obtain a better match with the phase/frequency characteristic (A), Fig. 2 (not shown), of the amplifier 5, 6. Similar considerations apply to the delay line 23 and the capacitor 22 in relation to the amplifier 17,18. The attenuator 10 compensates for the gain of 5, 6 so that the resultant attenuations along each path from input 1 to 16 are equal, the power hybrid 12 producing an output equal to the difference between the inputs at 11 and 15. The power combiner 20 subtracts the amplified error input at 19 from the uncorrected input at 24. It is not essential for the input signal at 1 to be divided into outputs of equal power at 3 and 4 provided that the attenuation of 10 and the gain of 17, 18 are correctly chosen.
GB4336274A 1975-09-18 1975-09-18 Wideband amplifier arrangement Expired GB1519456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4336274A GB1519456A (en) 1975-09-18 1975-09-18 Wideband amplifier arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4336274A GB1519456A (en) 1975-09-18 1975-09-18 Wideband amplifier arrangement

Publications (1)

Publication Number Publication Date
GB1519456A true GB1519456A (en) 1978-07-26

Family

ID=10428442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4336274A Expired GB1519456A (en) 1975-09-18 1975-09-18 Wideband amplifier arrangement

Country Status (1)

Country Link
GB (1) GB1519456A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243736A (en) * 1990-05-02 1991-11-06 Teledyne Mec Feed-forward amplifier including phase correction
US7656236B2 (en) 2007-05-15 2010-02-02 Teledyne Wireless, Llc Noise canceling technique for frequency synthesizer
US8179045B2 (en) 2008-04-22 2012-05-15 Teledyne Wireless, Llc Slow wave structure having offset projections comprised of a metal-dielectric composite stack
US9202660B2 (en) 2013-03-13 2015-12-01 Teledyne Wireless, Llc Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243736A (en) * 1990-05-02 1991-11-06 Teledyne Mec Feed-forward amplifier including phase correction
FR2661789A1 (en) * 1990-05-02 1991-11-08 Teledyne Mec FORWARD REACTION AND PHASE CORRECTION AMPLIFIER.
US5065110A (en) * 1990-05-02 1991-11-12 Teledyne Mec Feed-forward amplifier including phase correction
GB2243736B (en) * 1990-05-02 1995-02-08 Teledyne Mec Feed-forward amplifier including phase correction
US7656236B2 (en) 2007-05-15 2010-02-02 Teledyne Wireless, Llc Noise canceling technique for frequency synthesizer
US8179045B2 (en) 2008-04-22 2012-05-15 Teledyne Wireless, Llc Slow wave structure having offset projections comprised of a metal-dielectric composite stack
US9202660B2 (en) 2013-03-13 2015-12-01 Teledyne Wireless, Llc Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee