DE69121777D1 - Digital gesteuerter Oszillator - Google Patents
Digital gesteuerter OszillatorInfo
- Publication number
- DE69121777D1 DE69121777D1 DE69121777T DE69121777T DE69121777D1 DE 69121777 D1 DE69121777 D1 DE 69121777D1 DE 69121777 T DE69121777 T DE 69121777T DE 69121777 T DE69121777 T DE 69121777T DE 69121777 D1 DE69121777 D1 DE 69121777D1
- Authority
- DE
- Germany
- Prior art keywords
- controlled oscillator
- digitally controlled
- digitally
- oscillator
- controlled
- 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 - Lifetime
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
- H03L7/06—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
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
- H03L7/0991—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider
- H03L7/0994—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator being a digital oscillator, e.g. composed of a fixed oscillator followed by a variable frequency divider comprising an accumulator
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/03—Digital function generators working, at least partly, by table look-up
- G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
- G06F1/0328—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2143087A JPH0437205A (ja) | 1990-05-31 | 1990-05-31 | 発振装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69121777D1 true DE69121777D1 (de) | 1996-10-10 |
DE69121777T2 DE69121777T2 (de) | 1997-01-16 |
Family
ID=15330611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69121777T Expired - Lifetime DE69121777T2 (de) | 1990-05-31 | 1991-05-29 | Digital gesteuerter Oszillator |
Country Status (4)
Country | Link |
---|---|
US (1) | US5153526A (de) |
EP (1) | EP0459446B1 (de) |
JP (1) | JPH0437205A (de) |
DE (1) | DE69121777T2 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5495505A (en) * | 1990-12-20 | 1996-02-27 | Motorola, Inc. | Increased frequency resolution in a synthesizer |
US5130671A (en) * | 1990-12-26 | 1992-07-14 | Hughes Aircraft Company | Phase-locked loop frequency tracking device including a direct digital synthesizer |
US5361046A (en) * | 1992-12-22 | 1994-11-01 | Hughes Aircraft Company | Modulator having fractional sample/symbol time |
FI93505C (fi) * | 1993-05-03 | 1995-04-10 | Nokia Telecommunications Oy | Numeerisesti ohjattu oskillaattori ja digitaalinen vaihelukittu silmukka |
US5365182A (en) * | 1993-06-22 | 1994-11-15 | Motorola, Inc. | Method and apparatus for low power clock generation for high speed applications |
CA2125113A1 (en) * | 1993-08-31 | 1995-03-01 | Francesco Ledda | Method and circuitry for aligning the phase of high-speed clocks in telecommunications systems |
JPH07193564A (ja) * | 1993-12-25 | 1995-07-28 | Nec Corp | クロック再生装置および再生方法 |
US7002475B2 (en) * | 1997-12-31 | 2006-02-21 | Intermec Ip Corp. | Combination radio frequency identification transponder (RFID tag) and magnetic electronic article surveillance (EAS) tag |
US6167102A (en) * | 1998-08-03 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | System and method employing a reduced NCO lookup table |
JP2002182898A (ja) | 2000-12-14 | 2002-06-28 | Nec Microsystems Ltd | 積算値及び周期関数の生成方法及び回路 |
FR2832271A1 (fr) * | 2001-11-13 | 2003-05-16 | Koninkl Philips Electronics Nv | Tuner comprenant un convertisseur de tension |
US7064616B2 (en) | 2003-12-29 | 2006-06-20 | Teradyne, Inc. | Multi-stage numeric counter oscillator |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3824498A (en) * | 1972-12-22 | 1974-07-16 | Dallas Instr Inc | Digital processor for selectively synthesizing sinusoidal waveforms and frequency modulations |
US3973209A (en) * | 1975-08-29 | 1976-08-03 | Rca Corporation | Digital arithmetic synthesizer phase lock loop with direct doppler and frequency readout |
US4652832A (en) * | 1985-07-05 | 1987-03-24 | Motorola, Inc. | Frequency resolution in a digital oscillator |
JPH0683067B2 (ja) * | 1987-10-13 | 1994-10-19 | 松下電器産業株式会社 | 分周装置 |
US4901265A (en) * | 1987-12-14 | 1990-02-13 | Qualcomm, Inc. | Pseudorandom dither for frequency synthesis noise |
-
1990
- 1990-05-31 JP JP2143087A patent/JPH0437205A/ja active Pending
-
1991
- 1991-05-23 US US07/704,360 patent/US5153526A/en not_active Expired - Lifetime
- 1991-05-29 DE DE69121777T patent/DE69121777T2/de not_active Expired - Lifetime
- 1991-05-29 EP EP91108802A patent/EP0459446B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0459446B1 (de) | 1996-09-04 |
EP0459446A1 (de) | 1991-12-04 |
DE69121777T2 (de) | 1997-01-16 |
JPH0437205A (ja) | 1992-02-07 |
US5153526A (en) | 1992-10-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) |