CA942387A - Variable frequency system - Google Patents
Variable frequency systemInfo
- Publication number
- CA942387A CA942387A CA111,027A CA111027A CA942387A CA 942387 A CA942387 A CA 942387A CA 111027 A CA111027 A CA 111027A CA 942387 A CA942387 A CA 942387A
- Authority
- CA
- Canada
- Prior art keywords
- variable frequency
- frequency system
- variable
- frequency
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/64—Generators producing trains of pulses, i.e. finite sequences of pulses
- H03K3/72—Generators producing trains of pulses, i.e. finite sequences of pulses with means for varying repetition rate of trains
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
- G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3334370A | 1970-04-30 | 1970-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA942387A true CA942387A (en) | 1974-02-19 |
Family
ID=21869860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA111,027A Expired CA942387A (en) | 1970-04-30 | 1971-04-22 | Variable frequency system |
Country Status (2)
Country | Link |
---|---|
US (1) | US3651414A (en) |
CA (1) | CA942387A (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3786488A (en) * | 1971-12-30 | 1974-01-15 | Woodward Governor Co | Algebraic summing digital-to-analog converter |
DE2220878C3 (en) * | 1972-04-28 | 1982-04-22 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Circuit arrangement for digital frequency measurement |
US3909791A (en) * | 1972-06-28 | 1975-09-30 | Ibm | Selectively settable frequency divider |
JPS5549458B2 (en) * | 1972-08-10 | 1980-12-12 | ||
FR2241930B1 (en) * | 1973-08-23 | 1976-06-18 | Alsthom Cgee | |
JPS56169432A (en) * | 1980-05-31 | 1981-12-26 | Toshiba Corp | Frequency dividing ratio setting circuit for programmable counter |
US4573175A (en) * | 1983-09-12 | 1986-02-25 | Case Communications Inc. | Variable digital frequency generator with value storage |
US4862096A (en) * | 1987-05-13 | 1989-08-29 | Tektronix, Inc. | Programmable multiphase sequence controller |
US5657069A (en) * | 1991-12-13 | 1997-08-12 | Eastman Kodak Company | Method and apparatus for grey level printing |
US5493322A (en) * | 1993-04-01 | 1996-02-20 | Eastman Kodak Company | Electrophotographic image forming apparatus with non-uniformity correction of recording elements |
US6587528B1 (en) * | 1998-10-12 | 2003-07-01 | Ericsson Inc. | Systems and methods for extracting and digitizing phase and frequency information from an analog signal |
US8154321B2 (en) | 2007-12-21 | 2012-04-10 | Power Integrations, Inc. | Method and apparatus for time-differential comparison of an analog signal |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3044065A (en) * | 1957-08-05 | 1962-07-10 | Sperry Rand Corp | Electronic programming means for synchronizing a plurality of remotely located similar means |
US2998190A (en) * | 1958-05-09 | 1961-08-29 | Gen Dynamics Corp | Accumulator |
US3096483A (en) * | 1961-04-06 | 1963-07-02 | Bendix Corp | Frequency divider system with preset means to select countdown cycle |
US3378776A (en) * | 1964-10-09 | 1968-04-16 | Stanford Research Inst | Data shifting logic system with data and control signals advancing through the system in opposite directions |
-
1970
- 1970-04-30 US US33343A patent/US3651414A/en not_active Expired - Lifetime
-
1971
- 1971-04-22 CA CA111,027A patent/CA942387A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3651414A (en) | 1972-03-21 |
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