IT1036467B - Circuito filtro passaband a variazione di larghezza di banda - Google Patents

Circuito filtro passaband a variazione di larghezza di banda

Info

Publication number
IT1036467B
IT1036467B IT68771/75A IT6877175A IT1036467B IT 1036467 B IT1036467 B IT 1036467B IT 68771/75 A IT68771/75 A IT 68771/75A IT 6877175 A IT6877175 A IT 6877175A IT 1036467 B IT1036467 B IT 1036467B
Authority
IT
Italy
Prior art keywords
bandwidth
variation
band
pass filter
filter circuit
Prior art date
Application number
IT68771/75A
Other languages
English (en)
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of IT1036467B publication Critical patent/IT1036467B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
    • H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth
IT68771/75A 1974-07-08 1975-07-08 Circuito filtro passaband a variazione di larghezza di banda IT1036467B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7805974A JPS579530B2 (it) 1974-07-08 1974-07-08

Publications (1)

Publication Number Publication Date
IT1036467B true IT1036467B (it) 1979-10-30

Family

ID=13651267

Family Applications (1)

Application Number Title Priority Date Filing Date
IT68771/75A IT1036467B (it) 1974-07-08 1975-07-08 Circuito filtro passaband a variazione di larghezza di banda

Country Status (8)

Country Link
US (1) US3969678A (it)
JP (1) JPS579530B2 (it)
AU (1) AU501781B2 (it)
CA (1) CA1044339A (it)
DE (1) DE2530467C3 (it)
FR (1) FR2278197A1 (it)
GB (1) GB1480544A (it)
IT (1) IT1036467B (it)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1035117B (it) * 1975-03-28 1979-10-20 Selenta Ind Elettroniche Assoc Dispositivo ad alta stabilita per il filtraggio e la discriminayione in frequenza di un segnale elettrico
JPS54100639A (en) * 1978-01-26 1979-08-08 Fujitsu Ltd Band-pass filter circuit
DE2837538C2 (de) * 1978-08-28 1982-05-19 Gestra- KSB Vertriebsgesellschaft mbH. & Co KG, 2800 Bremen Thermisch gesteuertes Ventil
DE2837537C2 (de) * 1978-08-28 1983-04-28 Gestra-KSB Vertriebsgesellschaft mbH & Co KG, 2800 Bremen Mehrstufiges, thermostatisches Ventil
JPS5575361A (en) * 1978-12-04 1980-06-06 Oki Electric Ind Co Ltd Time-division multi-direction multiple transmission system
JPS6063685A (ja) * 1983-09-16 1985-04-12 Nec Corp 座標入力装置用雑音除去回路
DE3402441A1 (de) * 1984-01-25 1985-08-01 Gestra Ag, 2800 Bremen Kondensatableiter mit thermischem steuerelement
JPS60214617A (ja) * 1984-04-11 1985-10-26 Hitachi Ltd フイルタ集積回路
JP2560093B2 (ja) * 1988-10-05 1996-12-04 シャープ株式会社 Ｆｍチューナ
EP0496451B1 (en) * 1991-01-24 1996-11-13 Koninklijke Philips Electronics N.V. Non-linear signal processor
US5353311A (en) * 1992-01-09 1994-10-04 Nec Corporation Radio transmitter
JPH087059A (ja) * 1994-06-21 1996-01-12 Sony Chem Corp 非接触情報カード
US5548398A (en) * 1994-11-22 1996-08-20 Eastman Kodak Company Illuminant discriminator providing detection of high efficiency illumination
SE519372C2 (sv) * 2001-03-09 2003-02-18 Nat Semiconductor Corp Metod och krets för filtertrimning
US7203474B2 (en) * 2001-10-24 2007-04-10 Rohm Co., Ltd. Receiver system
US20050218973A1 (en) * 2002-05-31 2005-10-06 Mirsad Halimic Bandwidth adaptation rule for adaptive noise filter for inverse filtering with improved disturbance rejection bandwidth and speed
US7567133B2 (en) * 2006-04-06 2009-07-28 Mosaid Technologies Corporation Phase-locked loop filter capacitance with a drag current
US7982547B2 (en) * 2009-03-30 2011-07-19 Infineon Technologies Ag Phase locked loop-based tuning adjustable filter
CN102624360B (zh) * 2012-04-05 2015-06-10 四川和芯微电子股份有限公司 具有自动调节输出信号占空比功能的倍频电路及系统
CN116915223B (zh) * 2023-08-01 2024-02-27 合芯科技(苏州)有限公司 一种延迟电路及滤波器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714588A (en) * 1970-10-13 1973-01-30 Nasa Self tuning bandpass filter
US3678416A (en) * 1971-07-26 1972-07-18 Richard S Burwen Dynamic noise filter having means for varying cutoff point
US3835399A (en) * 1972-01-24 1974-09-10 R Holmes Adjustable electronic tunable filter with simulated inductor
JPS5641010B2 (it) * 1972-06-14 1981-09-25
US3786363A (en) * 1973-01-05 1974-01-15 Us Navy Voltage-controlled low-pass filter

Also Published As

Publication number Publication date
US3969678A (en) 1976-07-13
CA1044339A (en) 1978-12-12
JPS517849A (it) 1976-01-22
AU8284775A (en) 1977-01-13
DE2530467A1 (de) 1976-01-29
JPS579530B2 (it) 1982-02-22
FR2278197B1 (it) 1978-07-28
FR2278197A1 (fr) 1976-02-06
DE2530467C3 (de) 1978-04-27
GB1480544A (en) 1977-07-20
DE2530467B2 (de) 1977-08-18
AU501781B2 (en) 1979-06-28

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