KR970701952A - Circuit and method for generating accurate guadrature signals - Google Patents
Circuit and method for generating accurate guadrature signalsInfo
- Publication number
- KR970701952A KR970701952A KR1019960704891A KR19960704891A KR970701952A KR 970701952 A KR970701952 A KR 970701952A KR 1019960704891 A KR1019960704891 A KR 1019960704891A KR 19960704891 A KR19960704891 A KR 19960704891A KR 970701952 A KR970701952 A KR 970701952A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- quadrature
- generating
- signals
- deriving
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B27/00—Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Manipulation Of Pulses (AREA)
Abstract
입력 신호가 비교기에 공급되어, 기준 전압 VR과 비교된다. 다음에, 비교기의 출력 단자는 분주 회로에 접속되는데, 이 분주 회로는 입력 신호의 1/2의 주파수를 갖는 쿼드리쳐 신호들을 생성시킨다. 이 쿼드리쳐 신호들은 다음에 위상 검출기에 입력되는데, 이 검출기는 두 신호가 정확히 90°의 위상차를 보이지 않는 경우 이상차에 관련된 펄스 트레임을 출력시킨다. 다음에, 펄스 트레인은 조정된 기준 전압 VR을 얻기 위해 저역 필터 및 적분기에 전달된다. VR은 두 신호를 쿼드리쳐 관계로 만들기 위해 비교기의 제로 크로싱을 조정한다.The input signal is supplied to the comparator and compared with the reference voltage V R. The output terminal of the comparator is then connected to a divider circuit, which generates quadrature signals having a frequency of one half of the input signal. These quadrature signals are then input to the phase detector, which outputs a pulse train associated with the outlier if the two signals do not show exactly 90 ° out of phase. The pulse train is then passed to the low pass filter and the integrator to obtain an adjusted reference voltage V R. V R adjusts the zero crossing of the comparator to quadrature the two signals.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명에 따른 레벨 동기 루프(level-locked loop)의 블럭도이며,1 is a block diagram of a level-locked loop according to the present invention,
제2A도 내지 제2C도는 완전한 사인파가 저주파수에서 90°의 위상차를 갖는 I및 Q신호를 생성시키고 있음을 도시하는 타이밍도이고,2A to 2C are timing diagrams showing that a complete sine wave generates I and Q signals having a phase difference of 90 ° at low frequency,
제3A도 내지 제3C도는 입력 신호의 2차 고조파 성분이 I및 Q위상차의 오차를 야기시키고 있음을 도시하는 타이밍도이며,3A to 3C are timing diagrams showing that the second harmonic component of the input signal causes an error in the I and Q phase differences.
제4도는 본 발명에 대한 통상의 입력 신호를 나타내는 도면이고,4 is a diagram showing a typical input signal to the present invention,
제5A도 내지 제5E도는 본 발명의 시스템 동작 타이밍을 도시하는 타이밍도이다.5A to 5E are timing diagrams showing the system operation timing of the present invention.
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36655094A | 1994-12-30 | 1994-12-30 | |
US366,550 | 1994-12-30 | ||
PCT/IB1995/001141 WO1996021270A1 (en) | 1994-12-30 | 1995-12-20 | Circuit and method for generating accurate quadrature signals |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970701952A true KR970701952A (en) | 1997-04-12 |
Family
ID=23443498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960704891A KR970701952A (en) | 1994-12-30 | 1995-12-20 | Circuit and method for generating accurate guadrature signals |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0753216A1 (en) |
JP (1) | JP2002515190A (en) |
KR (1) | KR970701952A (en) |
CN (1) | CN1146259A (en) |
WO (1) | WO1996021270A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7085548B1 (en) * | 2001-07-13 | 2006-08-01 | Advanced Micro Devices, Inc. | Harmonic mixer |
CN100433541C (en) * | 2002-09-10 | 2008-11-12 | 华邦电子股份有限公司 | Apparatus and method for frequency signal starting |
WO2005122397A2 (en) * | 2004-06-08 | 2005-12-22 | Koninklijke Philips Electronics N.V. | Frequency tunable arrangement |
CN101454649B (en) * | 2005-09-21 | 2011-04-27 | Rjs科技公司 | System and method for a high dynamic range sensitive sensor element array |
JP4982350B2 (en) * | 2007-12-17 | 2012-07-25 | ルネサスエレクトロニクス株式会社 | Transceiver |
US8615205B2 (en) | 2007-12-18 | 2013-12-24 | Qualcomm Incorporated | I-Q mismatch calibration and method |
US8970272B2 (en) | 2008-05-15 | 2015-03-03 | Qualcomm Incorporated | High-speed low-power latches |
US8712357B2 (en) | 2008-11-13 | 2014-04-29 | Qualcomm Incorporated | LO generation with deskewed input oscillator signal |
US8718574B2 (en) | 2008-11-25 | 2014-05-06 | Qualcomm Incorporated | Duty cycle adjustment for a local oscillator signal |
US8847638B2 (en) | 2009-07-02 | 2014-09-30 | Qualcomm Incorporated | High speed divide-by-two circuit |
US8791740B2 (en) | 2009-07-16 | 2014-07-29 | Qualcomm Incorporated | Systems and methods for reducing average current consumption in a local oscillator path |
US8854098B2 (en) | 2011-01-21 | 2014-10-07 | Qualcomm Incorporated | System for I-Q phase mismatch detection and correction |
US9154077B2 (en) | 2012-04-12 | 2015-10-06 | Qualcomm Incorporated | Compact high frequency divider |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4696017A (en) * | 1986-02-03 | 1987-09-22 | E-Systems, Inc. | Quadrature signal generator having digitally-controlled phase and amplitude correction |
GB2196195B (en) * | 1986-09-16 | 1990-12-19 | Plessey Co Plc | Quadrature signal generator |
DE59009672D1 (en) * | 1989-06-09 | 1995-10-26 | Telefunken Microelectron | Circuit arrangement for frequency conversion. |
JPH05505297A (en) * | 1990-12-21 | 1993-08-05 | モトローラ・インコーポレーテッド | Apparatus and method for generating quadrature signals |
US5375258A (en) * | 1992-12-07 | 1994-12-20 | Motorola, Inc. | Circuit for generating signals in phase quadrature and associated method therefor |
-
1995
- 1995-12-20 WO PCT/IB1995/001141 patent/WO1996021270A1/en not_active Application Discontinuation
- 1995-12-20 CN CN95192565A patent/CN1146259A/en active Pending
- 1995-12-20 EP EP95938580A patent/EP0753216A1/en not_active Withdrawn
- 1995-12-20 KR KR1019960704891A patent/KR970701952A/en not_active Application Discontinuation
- 1995-12-20 JP JP52082596A patent/JP2002515190A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2002515190A (en) | 2002-05-21 |
WO1996021270A1 (en) | 1996-07-11 |
CN1146259A (en) | 1997-03-26 |
EP0753216A1 (en) | 1997-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WITN | Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid |