GB496145A - Improvements in or relating to radio receivers and the like - Google Patents

Improvements in or relating to radio receivers and the like

Info

Publication number
GB496145A
GB496145A GB14995/37A GB1499537A GB496145A GB 496145 A GB496145 A GB 496145A GB 14995/37 A GB14995/37 A GB 14995/37A GB 1499537 A GB1499537 A GB 1499537A GB 496145 A GB496145 A GB 496145A
Authority
GB
United Kingdom
Prior art keywords
range
frequency
wave range
intermediate frequency
couplings
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
GB14995/37A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB496145A publication Critical patent/GB496145A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection

Abstract

496,145. Superheterodyne circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 31, 1937, No. 14995. Convention date, May 29, 1936. [Class 40 (v)] In a multi-wave range superheterodyne receiver tuning coils used in the signal frequency selecting circuits on one wave range are utilized on another range as tuning coils in the intermediate frequency stage. The intermediate frequency used on each wave range is preferably one third of the lowest signal frequency in that range so that the required selectivity and image frequency ratio is obtained on each wave range. The Figure shows a high frequency amplifier 5 the input and output couplings of which are used as intermediate frequency couplings on the next highest frequency range. Additional tuning units 43, 68, 69 are provided for the local oscillator circuit.
GB14995/37A 1936-05-29 1937-05-31 Improvements in or relating to radio receivers and the like Expired GB496145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82416A US2150553A (en) 1936-05-29 1936-05-29 Multiwave band superheterodyne receiver

Publications (1)

Publication Number Publication Date
GB496145A true GB496145A (en) 1938-11-25

Family

ID=22171073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14995/37A Expired GB496145A (en) 1936-05-29 1937-05-31 Improvements in or relating to radio receivers and the like

Country Status (3)

Country Link
US (1) US2150553A (en)
CH (1) CH204090A (en)
GB (1) GB496145A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2606285A (en) * 1942-11-23 1952-08-05 Fr Des Telecomm Soc Double heterodyne radio receiver
US2586894A (en) * 1944-10-05 1952-02-26 Us Sec War Radio receiver
US2581194A (en) * 1948-06-16 1952-01-01 John M Lester Radio tuning system
US2629817A (en) * 1948-10-23 1953-02-24 Zenith Radio Corp Superheterodyne receiving system
US2596117A (en) * 1948-11-06 1952-05-13 Zenith Radio Corp Frequency converter system
US2650296A (en) * 1950-01-16 1953-08-25 Anchor Radio Corp Radio frequency amplifier
GB720760A (en) * 1952-03-03 1954-12-29 Philips Electrical Ind Ltd Improvements in or relating to radio receiver circuits for at least two ultra high-frequency ranges
US2890422A (en) * 1953-01-26 1959-06-09 Allen Bradley Co Electrically resonant dielectric body
US2811637A (en) * 1953-05-26 1957-10-29 Standard Coil Prod Co Inc Ultra high frequency turret tuner with uniform band spread on all bands
DE1067484B (en) * 1955-11-29 1959-10-22 Aladdin Ind Inc Overlay receiver for wave ranges that are far apart in terms of frequency

Also Published As

Publication number Publication date
CH204090A (en) 1939-04-15
US2150553A (en) 1939-03-14

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