JPS56114416A - Equalizer with variable amplitude and frequency characteristics - Google Patents

Equalizer with variable amplitude and frequency characteristics

Info

Publication number
JPS56114416A
JPS56114416A JP1705180A JP1705180A JPS56114416A JP S56114416 A JPS56114416 A JP S56114416A JP 1705180 A JP1705180 A JP 1705180A JP 1705180 A JP1705180 A JP 1705180A JP S56114416 A JPS56114416 A JP S56114416A
Authority
JP
Japan
Prior art keywords
resonator
variable
frequency
frequency characteristics
circulator
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.)
Pending
Application number
JP1705180A
Other languages
Japanese (ja)
Inventor
Teruhisa Kurokawa
Shinichi Shinagawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1705180A priority Critical patent/JPS56114416A/en
Publication of JPS56114416A publication Critical patent/JPS56114416A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
    • H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Waveguide Connection Structure (AREA)
  • Filters And Equalizers (AREA)

Abstract

PURPOSE:To enable easy adjustment with a given step, by branching an input signal to branch circuits through two transmission lines, and inserting a variable attenuator, variable phase shifter and variable synchronizing frequency resonator at one or both the transmission lines. CONSTITUTION:The input signal from the terminal 11 is branched at a branch circuit 12, one reaches to a synthesizer 12 through a delay circuit 15, and another reaches the resonator 19 through a variable attenuator 16, variable phase shifter 17, and circulator 18 and comes to the synthesizer 21 at full reflection at the resonator 19. By changing the turning frequency of the resonator 19, the valley of amplitude and frequency characteristics can be moved to an arbitrary location in the band. By changing the amount of coupling between the resonator 19 and the circulator 18, the sharpness (Q) of the valley of the characteristics is changed.
JP1705180A 1980-02-14 1980-02-14 Equalizer with variable amplitude and frequency characteristics Pending JPS56114416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1705180A JPS56114416A (en) 1980-02-14 1980-02-14 Equalizer with variable amplitude and frequency characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1705180A JPS56114416A (en) 1980-02-14 1980-02-14 Equalizer with variable amplitude and frequency characteristics

Publications (1)

Publication Number Publication Date
JPS56114416A true JPS56114416A (en) 1981-09-09

Family

ID=11933187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1705180A Pending JPS56114416A (en) 1980-02-14 1980-02-14 Equalizer with variable amplitude and frequency characteristics

Country Status (1)

Country Link
JP (1) JPS56114416A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1133052A2 (en) * 2000-03-07 2001-09-12 Matsushita Electric Industrial Co., Ltd. Delay circuit and feedforward amplifier
EP1973227A2 (en) 2007-03-19 2008-09-24 NEC Corporation Power divider/combiner and power dividing/combining method using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1133052A2 (en) * 2000-03-07 2001-09-12 Matsushita Electric Industrial Co., Ltd. Delay circuit and feedforward amplifier
EP1133052A3 (en) * 2000-03-07 2003-08-20 Matsushita Electric Industrial Co., Ltd. Delay circuit and feedforward amplifier
EP1973227A2 (en) 2007-03-19 2008-09-24 NEC Corporation Power divider/combiner and power dividing/combining method using the same

Similar Documents

Publication Publication Date Title
JPS5761313A (en) Band-pass filter for ultra-high frequency
GB1246686A (en) Improvements in or relating to signal transmission circuits
US3967220A (en) Variable delay equalizer
JPS56114416A (en) Equalizer with variable amplitude and frequency characteristics
US2879484A (en) Branching filter
US4783640A (en) Simultaneous-delay correlator apparatus
JPS55147060A (en) Fsk and psk modulating circuit
JPS5787225A (en) Band pass filter for very high frequency
JPS55162611A (en) Amplitude and phase adjuster
JPS5787226A (en) Band pass filter for very high frequency
JPS56144643A (en) Antenna common-use type transmitter and receiver
GB1464543A (en)
US3487337A (en) Distributed constant transversal equalizer
JPS57127302A (en) Synthesizer of high frequency signal
GB1517371A (en) Acoustic wave devices
JPS55132103A (en) Electromagnetic wave synthesizer
JPS561634A (en) Equalizer
JPS5491033A (en) Amplitude equalizer
JPS5473539A (en) Branching filter
JPS6450614A (en) Digital signal processing circuit
SU915135A1 (en) Microwave phase shifter
JPS5745703A (en) Output frequency stabilizing circuit for microwave oscillator
JPS5270732A (en) High/low harmonic wave deletion circuit
JPS533711A (en) Signal receiving circuit for frequency system
FR2385258A1 (en) Frequency comparator selector and filter - uses electronic switch to short circuit output if input frequency is not within passband