ZA817427B - Frequency counter - Google Patents
Frequency counterInfo
- Publication number
- ZA817427B ZA817427B ZA817427A ZA817427A ZA817427B ZA 817427 B ZA817427 B ZA 817427B ZA 817427 A ZA817427 A ZA 817427A ZA 817427 A ZA817427 A ZA 817427A ZA 817427 B ZA817427 B ZA 817427B
- Authority
- ZA
- South Africa
- Prior art keywords
- frequency counter
- counter
- frequency
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA000363389A CA1145399A (fr) | 1980-10-28 | 1980-10-28 | Frequencemetre |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA817427B true ZA817427B (en) | 1982-09-29 |
Family
ID=4118277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA817427A ZA817427B (en) | 1980-10-28 | 1981-10-27 | Frequency counter |
Country Status (5)
Country | Link |
---|---|
US (1) | US4395762A (fr) |
AU (1) | AU552902B2 (fr) |
CA (1) | CA1145399A (fr) |
GB (1) | GB2088164B (fr) |
ZA (1) | ZA817427B (fr) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4672556A (en) * | 1984-09-17 | 1987-06-09 | Sundstrand Corporation | Frequency detector system |
US4970656A (en) * | 1986-11-07 | 1990-11-13 | Alcon Laboratories, Inc. | Analog drive for ultrasonic probe with tunable phase angle |
US5001649A (en) * | 1987-04-06 | 1991-03-19 | Alcon Laboratories, Inc. | Linear power control for ultrasonic probe with tuned reactance |
US4914600A (en) * | 1987-06-05 | 1990-04-03 | Gruman Aerospace Corporation | Programmable frequency identifier circuit |
US5003502A (en) * | 1988-10-25 | 1991-03-26 | Halliburton Company | Digital filter for random variable |
US5179549A (en) * | 1988-11-10 | 1993-01-12 | Alcatel N.V. | Statistical measurement equipment and telecommunication system using same |
US5023819A (en) * | 1989-06-02 | 1991-06-11 | Halliburton Company | Linear shaped filter |
US4983906A (en) * | 1989-08-17 | 1991-01-08 | Hewlett-Packard Company | Frequency estimation system |
JPH03260866A (ja) * | 1990-03-12 | 1991-11-20 | Ricoh Co Ltd | 統計演算装置 |
US5095264A (en) * | 1990-09-12 | 1992-03-10 | Sundstrand Data Control, Inc. | Frequency counter and method of counting frequency of a signal to minimize effects of duty cycle modulation |
US5090034A (en) * | 1990-09-25 | 1992-02-18 | Ganza K Peter | Dual channel ionization counter |
US5097490A (en) * | 1991-01-14 | 1992-03-17 | Sundstrand Data Control, Inc. | Apparatus and method for improving the resolution with which a test signal is counted |
US5471402A (en) * | 1991-05-31 | 1995-11-28 | Optoelectronics, Inc. | Frequency counter |
DE19724742C2 (de) * | 1997-06-12 | 1999-03-25 | Georg Dieter Dr Mirow | Verfahren und Vorrichtung zur Anzeige von statistisch auftretenden Ereignissen |
KR100308205B1 (ko) | 1998-09-29 | 2001-11-30 | 윤종용 | 저전력소모카운터 |
US6502201B1 (en) * | 1999-10-14 | 2002-12-31 | International Business Machines Corporation | Determination of frequency of timer ticks |
KR101014370B1 (ko) * | 2008-12-22 | 2011-02-15 | 한국지질자원연구원 | 모든 방향에서 측정할 수 있는 양자 세차 자력계 센서 |
CN103412344B (zh) * | 2013-08-13 | 2016-03-30 | 北京桔灯地球物理勘探有限公司 | 多参数测量质子磁力仪 |
CN104851581B (zh) * | 2015-05-25 | 2016-07-27 | 三峡大学 | 一种高精度数字量输出电子式电流互感器 |
CN105490656A (zh) * | 2015-12-09 | 2016-04-13 | 张宇恒 | 用于数字温度补偿晶体振荡器的生产调测系统及调试方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2992384A (en) * | 1959-07-06 | 1961-07-11 | Thompson Ramo Wooldridge Inc | Frequency counter |
US3693097A (en) * | 1970-09-04 | 1972-09-19 | Hewlett Packard Co | Gate control apparatus for setting the input signal counting interval |
US3732405A (en) * | 1971-08-11 | 1973-05-08 | Nasa | Apparatus for statistical time-series analysis of electrical signals |
US3938042A (en) * | 1974-01-28 | 1976-02-10 | Hewlett-Packard Company | Measurement averaging counting apparatus employing a randomly phase modulated time base to improve counting resolution |
US4027146A (en) * | 1976-03-23 | 1977-05-31 | Heath Company | High speed accurate low frequency counter |
GB1592447A (en) * | 1976-11-09 | 1981-07-08 | Girling Ltd | Speed measuring systems |
US4093850A (en) * | 1977-02-22 | 1978-06-06 | Cutler-Hammer, Inc. | Ratemeter which calculates the reciprocal of the period |
US4150432A (en) * | 1977-12-19 | 1979-04-17 | Hewlett-Packard Company | Frequency counter and method |
US4224568A (en) * | 1978-05-08 | 1980-09-23 | Wagner Electric Corporation | Frequency to digital converter |
DE2914072C2 (de) * | 1979-04-07 | 1985-06-20 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | Schaltungsanordnung zur Ermittlung der Periodendauer und/oder davon abgeleiteten Größen eines im wesentlichen periodischen Signals |
-
1980
- 1980-10-28 CA CA000363389A patent/CA1145399A/fr not_active Expired
-
1981
- 1981-02-17 US US06/234,994 patent/US4395762A/en not_active Expired - Fee Related
- 1981-10-20 AU AU76618/81A patent/AU552902B2/en not_active Ceased
- 1981-10-27 GB GB8132300A patent/GB2088164B/en not_active Expired
- 1981-10-27 ZA ZA817427A patent/ZA817427B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US4395762A (en) | 1983-07-26 |
GB2088164B (en) | 1984-08-08 |
AU552902B2 (en) | 1986-06-26 |
GB2088164A (en) | 1982-06-03 |
CA1145399A (fr) | 1983-04-26 |
AU7661881A (en) | 1982-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56132793A (en) | High frequency heater | |
IL59799A0 (en) | Frequency moldulator | |
GB2088164B (en) | Frequency counter | |
GB2092844B (en) | Frequency synthesizer | |
GB2067751B (en) | Optical-pumping atomic frequency standard | |
JPS56134491A (en) | High frequency heater | |
DE3175667D1 (en) | Frequency synthesizer | |
JPS56161704A (en) | Frequency discriminator | |
JPS56162507A (en) | Frequency modulator | |
JPS57118164A (en) | Maximum frequency detector | |
JPS56102096A (en) | High frequency heater | |
JPS56159083A (en) | High frequency heater | |
DE3164867D1 (en) | Microwave waveguide-coupler | |
GB2095896B (en) | Magnetron | |
JPS56162923A (en) | Counter time limiting circuit | |
JPS5797327A (en) | Frequency relay | |
JPS5731825A (en) | Counter | |
JPS56112094A (en) | High frequency heater | |
JPS5788823A (en) | Frequency relay | |
JPS56159086A (en) | High frequency heater | |
JPS56159085A (en) | High frequency heater | |
JPS56152190A (en) | High frequency heater | |
JPS56118290A (en) | High frequency heater | |
GB2089603B (en) | Frequency synthesisers | |
GB2088602B (en) | Tape counter |