GB515843A - Improvements in or relating to electrical or electro-mechanical control systems of the error correcting type - Google Patents

Improvements in or relating to electrical or electro-mechanical control systems of the error correcting type

Info

Publication number
GB515843A
GB515843A GB1750738A GB1750738A GB515843A GB 515843 A GB515843 A GB 515843A GB 1750738 A GB1750738 A GB 1750738A GB 1750738 A GB1750738 A GB 1750738A GB 515843 A GB515843 A GB 515843A
Authority
GB
United Kingdom
Prior art keywords
frequency
variable frequency
frequency current
television
standard
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
GB1750738A
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.)
THOMAS CAYTON NUTTALL
Baird Television Ltd
Original Assignee
THOMAS CAYTON NUTTALL
Baird Television Ltd
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 THOMAS CAYTON NUTTALL, Baird Television Ltd filed Critical THOMAS CAYTON NUTTALL
Priority to GB1750738A priority Critical patent/GB515843A/en
Publication of GB515843A publication Critical patent/GB515843A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B5/00—Anti-hunting arrangements
    • G05B5/01—Anti-hunting arrangements electric
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0138—Electrical filters or coupling circuits
    • H03H7/0146—Coupling circuits between two tubes, not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/06—Frequency selective two-port networks including resistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/06—Frequency selective two-port networks including resistors
    • H03H7/07—Bridged T-filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1716—Comprising foot-point elements
    • H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/075—Ladder networks, e.g. electric wave filters

Abstract

515,843. Television. BAIRD TELEVISION, Ltd., and NUTTALL, T. C. June 13, 1938, No. 17507. Drawings to Specification. [Class 40 (iii)] [Also in Group XXXV] The deviations of a variable frequency current from a standard frequency current are corrected by applying both to a detector whose output is a measure of the deviation, and applying the output to correct the variable frequency. According to the invention,. the output is applied through a low-pass filter so as to prevent fluctuations above a predetermined frequency in the standard frequency having much effect on the correction, and the filter produces a phase advance which is a maximum near the limiting frequency to prevent instability. Suitable filters are shown in Figs. 6, 9 ... 16 (not shown). The invention is applied to television (in which the variable frequency current is the scanning oscillator and the standard-frequency current is a mains supply), and to gramophones (in which the variable frequency current is derived from the turntable). The variable frequency may be derived from an oscillator whose frequency is determined by a condenser varied by an electromagnetic system under the control of a dash-pot.
GB1750738A 1938-06-13 1938-06-13 Improvements in or relating to electrical or electro-mechanical control systems of the error correcting type Expired GB515843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1750738A GB515843A (en) 1938-06-13 1938-06-13 Improvements in or relating to electrical or electro-mechanical control systems of the error correcting type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1750738A GB515843A (en) 1938-06-13 1938-06-13 Improvements in or relating to electrical or electro-mechanical control systems of the error correcting type

Publications (1)

Publication Number Publication Date
GB515843A true GB515843A (en) 1939-12-15

Family

ID=10096392

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1750738A Expired GB515843A (en) 1938-06-13 1938-06-13 Improvements in or relating to electrical or electro-mechanical control systems of the error correcting type

Country Status (1)

Country Link
GB (1) GB515843A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016184605A1 (en) * 2015-05-21 2016-11-24 Robert Bosch Gmbh Signal processing device and control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016184605A1 (en) * 2015-05-21 2016-11-24 Robert Bosch Gmbh Signal processing device and control device
US10320359B2 (en) 2015-05-21 2019-06-11 Robert Bosch Gmbh Signal processing device and control device

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