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
GB814650A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHN JAMES EDWIN ASPIN
General Electric Co PLC
Original Assignee
JOHN JAMES EDWIN ASPIN
General Electric Co PLC
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 by JOHN JAMES EDWIN ASPIN, General Electric Co PLCfiledCriticalJOHN JAMES EDWIN ASPIN
Priority to GB814650ApriorityCriticalpatent/GB678734A/en
Publication of GB678734ApublicationCriticalpatent/GB678734A/en
H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
H03L7/00—Automatic control of frequency or phase; Synchronisation
H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element
Landscapes
Measurement Of Resistance Or Impedance
(AREA)
Abstract
678,734. Frequency discriminators. GENERAL ELECTRIC CO., Ltd., and ASPIN, J. J. E. March 28, 1951 [March 31, 1950], No. 8146/50. Class 37. The frequency wave deviation from standard to be measured is applied to a cathode follower valve 1 feeding two damped series resonant circuits 6, 8, 9 and 7, 1.0, 11 tuned above and below the standard frequency; the whole or a part of the voltages developed across resistances 9, 11 is rectified at 12, 13 and combined in opposition at 22 to provide a signal whose sign and magnitude corresponds to the deviation of the frequency from standard.
GB814650A1950-03-311950-03-31Improvements in or relating to discriminator circuits
ExpiredGB678734A
(en)