IT7919585A0 - Circuito di filtro passa-banda a inseguimento. - Google Patents

Circuito di filtro passa-banda a inseguimento.

Info

Publication number
IT7919585A0
IT7919585A0 IT7919585A IT1958579A IT7919585A0 IT 7919585 A0 IT7919585 A0 IT 7919585A0 IT 7919585 A IT7919585 A IT 7919585A IT 1958579 A IT1958579 A IT 1958579A IT 7919585 A0 IT7919585 A0 IT 7919585A0
Authority
IT
Italy
Prior art keywords
pass filter
filter circuit
tracking band
tracking
band
Prior art date
Application number
IT7919585A
Other languages
English (en)
Other versions
IT1110501B (it
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
Publication of IT7919585A0 publication Critical patent/IT7919585A0/it
Application granted granted Critical
Publication of IT1110501B publication Critical patent/IT1110501B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/0405—Non-linear filters
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
    • H03L2207/06—Phase locked loops with a controlled oscillator having at least two frequency control terminals

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Filters And Equalizers (AREA)
IT19585/79A 1978-01-26 1979-01-25 Circuito di filtro passa-banda a inseguimento IT1110501B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP749078A JPS54100639A (en) 1978-01-26 1978-01-26 Band-pass filter circuit

Publications (2)

Publication Number Publication Date
IT7919585A0 true IT7919585A0 (it) 1979-01-25
IT1110501B IT1110501B (it) 1985-12-23

Family

ID=11667198

Family Applications (1)

Application Number Title Priority Date Filing Date
IT19585/79A IT1110501B (it) 1978-01-26 1979-01-25 Circuito di filtro passa-banda a inseguimento

Country Status (7)

Country Link
US (1) US4361894A (it)
JP (1) JPS54100639A (it)
CA (1) CA1143445A (it)
DE (1) DE2902680C2 (it)
FR (1) FR2415913B1 (it)
GB (1) GB2016835B (it)
IT (1) IT1110501B (it)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2080061B (en) * 1980-07-02 1984-03-14 Philips Electronic Associated Amplifier circuit arrangement suitable for use in phase lock loop
US4525676A (en) * 1981-02-24 1985-06-25 Nippon Electric Co., Ltd. PSK Demodulation system having carrier frequency variation compensation
JPS58131569A (ja) * 1982-02-01 1983-08-05 Honda Motor Co Ltd 基準車輪速度設定装置
US4539524A (en) * 1983-12-30 1985-09-03 Motorola, Inc. Method and coherent demodulators for MSK signal
US4672632A (en) * 1984-02-03 1987-06-09 Motorola, Inc. Optimized communications system and method employing channel synthesis and phase lock detection
JPS60203045A (ja) * 1984-03-28 1985-10-14 Nec Corp 位相同期検波復調器
JPS6211347A (ja) * 1985-07-09 1987-01-20 Nec Home Electronics Ltd ４相ｐｓｋ復調装置
US4794623A (en) * 1985-10-17 1988-12-27 At&T Telephone And Telegraph Company, At&T Bell Laboratories Recovery of carrier signal from QAM double sideband suppressed carrier IF signal for use in synchronous demodulation
US5001727A (en) * 1989-02-15 1991-03-19 Terra Marine Engineering, Inc. Carrier and data recovery and demodulation system
US5058136A (en) * 1990-12-17 1991-10-15 Motorola, Inc. Coherent detection for QPSK modulation
US5397945A (en) * 1992-08-04 1995-03-14 Samsung Semiconductor, Inc. Duty cycle control circuit
FI107090B (fi) * 1999-04-19 2001-05-31 Nokia Mobile Phones Ltd Menetelmä ja järjestely resonaattorin virittämiseksi
US7082293B1 (en) * 1999-10-21 2006-07-25 Broadcom Corporation Adaptive radio transceiver with CMOS offset PLL
US7414933B2 (en) * 2002-08-12 2008-08-19 Victor Company Of Japan, Ltd. Reproducing apparatus having an improved PLL circuit and related computer program
DE102005024624B3 (de) * 2005-05-30 2006-11-30 Siemens Ag Schaltungsanordnung zur Erzeugung eines Referenzsignals
US8436693B2 (en) * 2006-08-23 2013-05-07 St-Ericsson Sa Filter-tracking and control method
US8232807B2 (en) * 2006-10-25 2012-07-31 Textron Innovations Inc. Apparatus for detecting imbalances in a paired line
US20080100308A1 (en) * 2006-10-25 2008-05-01 Robert Crick Apparatus for detecting imbalances in a paired line
AT505079B1 (de) * 2007-03-21 2011-09-15 Siemens Ag Verfahren zur rekonstruktion eines störungsreduzierten periodischen spannungssignals
US9859863B2 (en) 2013-03-15 2018-01-02 Qorvo Us, Inc. RF filter structure for antenna diversity and beam forming
US9391565B2 (en) 2013-03-15 2016-07-12 TriQuint International PTE, Ltd. Amplifier phase distortion correction based on amplitude distortion measurement
US9444417B2 (en) 2013-03-15 2016-09-13 Qorvo Us, Inc. Weakly coupled RF network based power amplifier architecture
US9755671B2 (en) 2013-08-01 2017-09-05 Qorvo Us, Inc. VSWR detector for a tunable filter structure
US9899133B2 (en) 2013-08-01 2018-02-20 Qorvo Us, Inc. Advanced 3D inductor structures with confined magnetic field
US9871499B2 (en) 2013-03-15 2018-01-16 Qorvo Us, Inc. Multi-band impedance tuners using weakly-coupled LC resonators
US9685928B2 (en) 2013-08-01 2017-06-20 Qorvo Us, Inc. Interference rejection RF filters
US9705478B2 (en) 2013-08-01 2017-07-11 Qorvo Us, Inc. Weakly coupled tunable RF receiver architecture
US9780756B2 (en) * 2013-08-01 2017-10-03 Qorvo Us, Inc. Calibration for a tunable RF filter structure
US9628045B2 (en) 2013-08-01 2017-04-18 Qorvo Us, Inc. Cooperative tunable RF filters
US9774311B2 (en) 2013-03-15 2017-09-26 Qorvo Us, Inc. Filtering characteristic adjustments of weakly coupled tunable RF filters
US9825656B2 (en) 2013-08-01 2017-11-21 Qorvo Us, Inc. Weakly coupled tunable RF transmitter architecture
US9866197B2 (en) 2013-06-06 2018-01-09 Qorvo Us, Inc. Tunable RF filter based RF communications system
US12224096B2 (en) 2013-03-15 2025-02-11 Qorvo Us, Inc. Advanced 3D inductor structures with confined magnetic field
US9780817B2 (en) 2013-06-06 2017-10-03 Qorvo Us, Inc. RX shunt switching element-based RF front-end circuit
US9966981B2 (en) 2013-06-06 2018-05-08 Qorvo Us, Inc. Passive acoustic resonator based RF receiver
US9800282B2 (en) 2013-06-06 2017-10-24 Qorvo Us, Inc. Passive voltage-gain network
US9705542B2 (en) 2013-06-06 2017-07-11 Qorvo Us, Inc. Reconfigurable RF filter
US10796835B2 (en) 2015-08-24 2020-10-06 Qorvo Us, Inc. Stacked laminate inductors for high module volume utilization and performance-cost-size-processing-time tradeoff
US11139238B2 (en) 2016-12-07 2021-10-05 Qorvo Us, Inc. High Q factor inductor structure

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339633A (en) * 1942-03-23 1944-01-18 Bell Telephone Labor Inc Variable selective system
US3217259A (en) * 1959-07-06 1965-11-09 Kenneth L Kotzebue Receiver utilizing phase-locked parametric amplifier
US2976408A (en) * 1960-04-25 1961-03-21 Albert C Colaguori Synchronous selectivity receiver
US3278685A (en) * 1962-12-31 1966-10-11 Ibm Wave analyzing system
US3281534A (en) * 1963-05-09 1966-10-25 William C Dersch Nasality meter
US3588752A (en) * 1969-08-28 1971-06-28 Sylvania Electric Prod Tracking filter
US3718909A (en) * 1970-06-18 1973-02-27 Medtronic Inc Rate controller and checker for pulse generator means
JPS5323659B1 (it) * 1970-08-04 1978-07-15
US3757244A (en) * 1972-03-06 1973-09-04 Bell Telephone Labor Inc Mplitude phase locked loop with non linear filter responsive to error signal a
JPS5641010B2 (it) * 1972-06-14 1981-09-25
GB1433334A (en) * 1972-06-20 1976-04-28 Nat Res Dev Single side-band radio
JPS5338075B2 (it) * 1973-05-16 1978-10-13
JPS579530B2 (it) * 1974-07-08 1982-02-22
JPS5229146B2 (it) * 1974-12-18 1977-07-30
NL7609029A (nl) * 1975-08-19 1977-02-22 British Petroleum Co Inrichting voor het opvangen van zonneenergie.
US4061979A (en) * 1975-10-20 1977-12-06 Digital Communications Corporation Phase locked loop with pre-set and squelch
JPS5831065B2 (ja) * 1976-04-09 1983-07-04 日本電気株式会社 Ｆｓｋ復調装置
JPS5912214B2 (ja) * 1976-12-10 1984-03-21 山水電気株式会社 同期信号発生回路

Also Published As

Publication number Publication date
FR2415913A1 (fr) 1979-08-24
GB2016835A (en) 1979-09-26
DE2902680A1 (de) 1979-08-02
CA1143445A (en) 1983-03-22
DE2902680C2 (de) 1983-08-25
JPS54100639A (en) 1979-08-08
FR2415913B1 (fr) 1986-08-29
IT1110501B (it) 1985-12-23
US4361894A (en) 1982-11-30
GB2016835B (en) 1982-04-15

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