GB1297919A - - Google Patents

Info

Publication number
GB1297919A
GB1297919A GB1297919DA GB1297919A GB 1297919 A GB1297919 A GB 1297919A GB 1297919D A GB1297919D A GB 1297919DA GB 1297919 A GB1297919 A GB 1297919A
Authority
GB
United Kingdom
Prior art keywords
oscillator
frequency
contact
unknown
voltage
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
Application number
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1297919A publication Critical patent/GB1297919A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
GB1297919D 1969-01-15 1969-01-15 Expired GB1297919A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB243869 1969-01-15

Publications (1)

Publication Number Publication Date
GB1297919A true GB1297919A (enrdf_load_stackoverflow) 1972-11-29

Family

ID=9739587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297919D Expired GB1297919A (enrdf_load_stackoverflow) 1969-01-15 1969-01-15

Country Status (1)

Country Link
GB (1) GB1297919A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218217A (en) * 1988-05-02 1989-11-08 Mitel Corp Voltage monitor for in-circuit testing
GB2219408A (en) * 1987-12-31 1989-12-06 Richard Leigh Aubrey Electrical voltage tester
CN102116805A (zh) * 2009-12-30 2011-07-06 晨星软件研发(深圳)有限公司 信号能量判断装置及信号能量判断方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219408A (en) * 1987-12-31 1989-12-06 Richard Leigh Aubrey Electrical voltage tester
GB2219408B (en) * 1987-12-31 1991-08-14 Richard Leigh Aubrey Electrical voltage tester
GB2218217A (en) * 1988-05-02 1989-11-08 Mitel Corp Voltage monitor for in-circuit testing
GB2218217B (en) * 1988-05-02 1992-08-19 Mitel Corp Voltage monitor for in-circuit testing
CN102116805A (zh) * 2009-12-30 2011-07-06 晨星软件研发(深圳)有限公司 信号能量判断装置及信号能量判断方法
CN102116805B (zh) * 2009-12-30 2013-06-12 晨星软件研发(深圳)有限公司 信号能量判断装置及信号能量判断方法

Similar Documents

Publication Publication Date Title
GB1526636A (en) Circuit for automatic dynamic compression or expansion
GB1458545A (en) Window detector circuit
GB1431922A (en) Terminal equipment for a telephone system
GB1297919A (enrdf_load_stackoverflow)
GB664401A (en) Improvements in thermionic valve circuits
GB1300226A (en) Control circuits for invertors
GB1530297A (en) Circuit arrangement for noise level suppression
GB1384927A (en) Amplitude-adjustment circuits for transmitters
GB1338896A (en) Hybrid networks
GB1290520A (enrdf_load_stackoverflow)
ES459130A1 (es) Una disposicion de recepcion para un sistema de alta fre- cuencia de deteccion de la intrusion.
GB1190415A (en) Landline Facsimile System
JPS55104152A (en) Am stereo demodulation circuit
GB945269A (en) Balanced frequency detector circuit
JPS5575379A (en) Multiple signal demodulator
GB1020649A (en) Telemetering of analog and digital information
GB1461356A (en) Drop-out compensating circuit
GB1381894A (en) Television receivers
GB1241153A (en) A circuit or converting a direct current potential to an alternating current potential
JPS5591220A (en) Bass compensating circuit
US3557319A (en) Signaling guard circuit
GB1268782A (en) Transmission system
SU542329A1 (ru) Устройство дл временной автоматической регулировки усилинени
JPS5568729A (en) Input circuit with input level decision
GB1338241A (en) Apparatus for testing delay units

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees