GB577455A - Improvements in and relating to amplifiers for electric wave signals - Google Patents

Improvements in and relating to amplifiers for electric wave signals

Info

Publication number
GB577455A
GB577455A GB892340A GB892340A GB577455A GB 577455 A GB577455 A GB 577455A GB 892340 A GB892340 A GB 892340A GB 892340 A GB892340 A GB 892340A GB 577455 A GB577455 A GB 577455A
Authority
GB
United Kingdom
Prior art keywords
amplifier
harmonic
frequency
output
signals
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
GB892340A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB577455A publication Critical patent/GB577455A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/20—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating powers, roots, polynomes, mean square values, standard deviation

Abstract

577,455. Wireless receiving systems. ROBINSON, J. April 19, 1939, Nos. 8923/40 and 8924/40. Divided out of 577,453. [Class 40 (v)] Incoming signals are mixed with local frequency-changing oscillations, which are derived from the signals and vary in amplitude with them, so that the output from the frequency-changer is proportional in amplitude to the product of the applied signals and the local oscillations. The amplifier output of harmonic frequency may be made proportional -to the square, cube, or higher power of the input, or to a fractional power of it. The harmonic of the signal may be obtained by passing the latter through a distorting device such as a leaky-grid detector. As shown, the signals are applied to an amplifier 11 having two outputs in parallel. One passes through an amplifier 12 to the frequency-changer 16, whilst the other passes first through a filter 13, and a harmonic-producer 14, and an amplifier 15 tuned to the desired harmonic. The output from the converter 16 may be converted back to the original frequency in a second converter 17, which is also coupled to the amplifier 15. Alternatively, both parallel paths may include harmonic-producers. The rectified resultant current may be used for automatic volume control. The output from 17 may be fed back to the amplifier 11 at any desired phase angle to give either positive or negative reaction. As applied to. a direction finder, an output corresponding to a high power of the input may be used to give an increased directional sensitivity, especially for " maximum " readings. By using negative feed-back, the minimum critical point would sharpen.
GB892340A 1939-04-19 1939-04-19 Improvements in and relating to amplifiers for electric wave signals Expired GB577455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1182239A GB577453A (en) 1939-04-19 1939-04-19 Improvements in and relating to amplifiers for electric wave signals

Publications (1)

Publication Number Publication Date
GB577455A true GB577455A (en) 1946-05-20

Family

ID=9993323

Family Applications (2)

Application Number Title Priority Date Filing Date
GB892340A Expired GB577455A (en) 1939-04-19 1939-04-19 Improvements in and relating to amplifiers for electric wave signals
GB1182239A Expired GB577453A (en) 1939-04-19 1939-04-19 Improvements in and relating to amplifiers for electric wave signals

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1182239A Expired GB577453A (en) 1939-04-19 1939-04-19 Improvements in and relating to amplifiers for electric wave signals

Country Status (1)

Country Link
GB (2) GB577455A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548671A (en) * 1949-06-16 1951-04-10 Bell Telephone Labor Inc Directional radio reception

Also Published As

Publication number Publication date
GB577453A (en) 1946-05-20

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