SE9203469D0 - Frekvensvakt - Google Patents
FrekvensvaktInfo
- Publication number
- SE9203469D0 SE9203469D0 SE9203469A SE9203469A SE9203469D0 SE 9203469 D0 SE9203469 D0 SE 9203469D0 SE 9203469 A SE9203469 A SE 9203469A SE 9203469 A SE9203469 A SE 9203469A SE 9203469 D0 SE9203469 D0 SE 9203469D0
- Authority
- SE
- Sweden
- Prior art keywords
- frequency
- capacitor
- frequency guard
- converters
- demands
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R23/15—Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
- G01R23/09—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Nonlinear Science (AREA)
- Measurement Of Current Or Voltage (AREA)
- Dc-Dc Converters (AREA)
- Semiconductor Integrated Circuits (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9203469A SE470527B (sv) | 1992-11-18 | 1992-11-18 | Metod och anordning för att detektera om en signal har en önskad på förhand fastställd frekvens eller ej |
GB9323240A GB2272810B (en) | 1992-11-18 | 1993-11-11 | Frequency controlled switch |
DE4339164A DE4339164C2 (de) | 1992-11-18 | 1993-11-16 | Frequenzdetektionsverfahren und Frequenzdetektionsvorrichtung |
US08/567,804 US5781039A (en) | 1992-11-18 | 1995-12-06 | Frequency controlled switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9203469A SE470527B (sv) | 1992-11-18 | 1992-11-18 | Metod och anordning för att detektera om en signal har en önskad på förhand fastställd frekvens eller ej |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9203469D0 true SE9203469D0 (sv) | 1992-11-18 |
SE9203469L SE9203469L (sv) | 1994-05-19 |
SE470527B SE470527B (sv) | 1994-07-04 |
Family
ID=20387862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9203469A SE470527B (sv) | 1992-11-18 | 1992-11-18 | Metod och anordning för att detektera om en signal har en önskad på förhand fastställd frekvens eller ej |
Country Status (4)
Country | Link |
---|---|
US (1) | US5781039A (sv) |
DE (1) | DE4339164C2 (sv) |
GB (1) | GB2272810B (sv) |
SE (1) | SE470527B (sv) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6614288B1 (en) * | 1998-05-20 | 2003-09-02 | Astec International Limited | Adaptive drive circuit for zero-voltage and low-voltage switches |
JP4141039B2 (ja) * | 1998-06-10 | 2008-08-27 | 日本信号株式会社 | 閾値演算回路及びこれを用いたandゲート回路、自己保持回路及び起動信号発生回路 |
GB2495100B (en) * | 2011-09-28 | 2019-02-13 | Tridonic Uk Ltd | Monitoring of pulse width modulation control |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3398366A (en) * | 1965-01-29 | 1968-08-20 | Westinghouse Electric Corp | Highly accurate frequency measuring circuit |
US3462614A (en) * | 1965-10-24 | 1969-08-19 | Berry Ind Inc | Frequency selective circuit with output according to a ratio of alternating current signals-to-direct current signals which varies with frequency |
US3593171A (en) * | 1968-09-21 | 1971-07-13 | Int Standard Electric Corp | Frequency discriminator having conduction controlled means |
US3582974A (en) * | 1968-10-30 | 1971-06-01 | Bell Telephone Labor Inc | Circuit to analyze a signal amplitude range through frequency discrimination techniques |
US3584298A (en) * | 1969-03-21 | 1971-06-08 | Sun Electric Corp | Frequency detection apparatus including voltage responsive means coupling first and second capacitor charge-discharge circuits |
US3584275A (en) * | 1969-04-01 | 1971-06-08 | Kidde & Co Walter | Frequency responsive switching circuit |
FR2140262B1 (sv) * | 1971-06-07 | 1975-01-17 | Schlumberger Compteurs | |
US3811052A (en) * | 1973-01-24 | 1974-05-14 | Froment N & Co | Electrical frequency indicating means |
US3852616A (en) * | 1973-02-21 | 1974-12-03 | Bendix Corp | Frequency selection by period timing |
US3914619A (en) * | 1975-01-08 | 1975-10-21 | Ford Motor Co | Frequency responsive switching circuit |
US4081694A (en) * | 1976-08-23 | 1978-03-28 | Ford Motor Company | Circuit for detecting the occurrence of a predetermined input frequency |
US4146846A (en) * | 1978-05-15 | 1979-03-27 | Tektronix, Inc. | Amplifier having a high frequency boost network |
US4230958A (en) * | 1978-08-09 | 1980-10-28 | Bell Telephone Laboratories, Incorporated | Loss of clock detector circuit |
GB2087118B (en) * | 1980-11-06 | 1984-11-07 | British Gas Corp | Fuel burner control system circuit |
JPS603561A (ja) * | 1983-06-20 | 1985-01-09 | Nissan Motor Co Ltd | 自動変速機の変速制御装置 |
DE3610605A1 (de) * | 1986-03-29 | 1987-10-01 | Fichtel & Sachs Ag | Frequenzschalter |
JP2870277B2 (ja) * | 1991-01-29 | 1999-03-17 | 日本電気株式会社 | ダイナミック型ランダムアクセスメモリ装置 |
US5151591A (en) * | 1991-03-20 | 1992-09-29 | Honeywell Inc. | Asynchronous signal interrogation circuit for an detection apparatus |
US5382838A (en) * | 1993-03-18 | 1995-01-17 | Northern Telecom Limited | Digital driver with class AB output stage |
US5327099A (en) * | 1993-08-02 | 1994-07-05 | Motorola, Inc. | Differential stage that provides minimal offset between inputs |
-
1992
- 1992-11-18 SE SE9203469A patent/SE470527B/sv not_active IP Right Cessation
-
1993
- 1993-11-11 GB GB9323240A patent/GB2272810B/en not_active Expired - Fee Related
- 1993-11-16 DE DE4339164A patent/DE4339164C2/de not_active Expired - Lifetime
-
1995
- 1995-12-06 US US08/567,804 patent/US5781039A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
SE9203469L (sv) | 1994-05-19 |
GB2272810B (en) | 1996-10-16 |
SE470527B (sv) | 1994-07-04 |
US5781039A (en) | 1998-07-14 |
DE4339164A1 (de) | 1994-05-19 |
DE4339164C2 (de) | 2003-06-26 |
GB2272810A (en) | 1994-05-25 |
GB9323240D0 (en) | 1994-01-05 |
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Legal Events
Date | Code | Title | Description |
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NAL | Patent in force |
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NUG | Patent has lapsed |