GB1244648A - Improvements in or relating to frequency-changer circuits - Google Patents

Improvements in or relating to frequency-changer circuits

Info

Publication number
GB1244648A
GB1244648A GB4918868A GB4918868A GB1244648A GB 1244648 A GB1244648 A GB 1244648A GB 4918868 A GB4918868 A GB 4918868A GB 4918868 A GB4918868 A GB 4918868A GB 1244648 A GB1244648 A GB 1244648A
Authority
GB
United Kingdom
Prior art keywords
frequency
filter
scanning
band
signal
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
GB4918868A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1244648A publication Critical patent/GB1244648A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
    • H04B1/0082—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands with a common local oscillator for more than one band
    • H04B1/0089—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands with a common local oscillator for more than one band using a first intermediate frequency higher that the highest of any band received
    • H04B1/0092—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands with a common local oscillator for more than one band using a first intermediate frequency higher that the highest of any band received using a wideband front end
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

1,244,648. Frequency changers; radio receiving circuits. SIEMENS A.G. 17 Oct., 1968 [18 Oct., 1967], No. 49188/68. Headings H3Q and H3T. A superheterodyne signal amplifier has a frequency changer circuit in which selective frequency conversion is effected by a pulsescanned N-path filter operated at a scanning frequency which is a sub-harmonic of the signal frequency. A signal of frequency f 1' Fig. 1, applied to an input terminal E is fed to an N-path filter 1 which is scanned by scanning pulses from a scanning generator 2. The output of the N-path filter 1 is connected to a band-pass filter 3 which passes the frequency f 2 . The invention, which is stated to be particularly suitable for use as a second mixer stage in a double superheterodyne receiver, depends upon the property of the N-pass filter that if the input signal has the frequency, e.g. 3f 0 , where f 0 is the scanning frequency there will be in the output not only components of the frequencies 4# 0 , 5# 0 &c. but also the frequencies # 0 and 2# 0 . In a second embodiment the N-path filter is followed by three band-pass filters giving outputs at different frequencies (Fig. 2, not shown). A further embodiment comprises an A.F./F.M. receiver which comprises a double superheterodyne on F.M., the incoming signal f 1 , Fig. 3, being converted to a first intermediate frequency ZF 1 in a first mixer 31, and passed via band-pass filter 33 and switch S to a second frequency changer, comprising N-path filter 1 having scanning generator 2, the second intermediate frequency ZF 2 being selected by bandpass filter 35. A.M. signals of frequency f 1 <SP>1</SP> are converted directly to the final intermediate frequency 2F2 by means of mixer 32 which is followed by band-pass filter 34. The output of filter 34 is fed via switch S in reversed position to N-path filter 1, which on this waveband operates purely as a filter.
GB4918868A 1967-10-18 1968-10-17 Improvements in or relating to frequency-changer circuits Expired GB1244648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0112459 1967-10-18

Publications (1)

Publication Number Publication Date
GB1244648A true GB1244648A (en) 1971-09-02

Family

ID=7531797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4918868A Expired GB1244648A (en) 1967-10-18 1968-10-17 Improvements in or relating to frequency-changer circuits

Country Status (6)

Country Link
AT (1) AT284911B (en)
BE (1) BE722092A (en)
DE (1) DE1591583B1 (en)
FR (1) FR1588419A (en)
GB (1) GB1244648A (en)
NL (1) NL6812574A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168864A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Radio receiver/transmitter filters
GB2173660A (en) * 1985-03-28 1986-10-15 Multitone Electronics Plc Paging receiver
CN107425923A (en) * 2017-09-04 2017-12-01 林宇 The magnetic fibre receiver in 1G-1 thousand ten thousand G more than fine for magnetic long broadband

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584986A (en) * 1946-04-24 1952-02-12 Fed Telephone & Radio Corp Selective wave filter
US2909656A (en) * 1953-01-06 1959-10-20 Lab For Electronics Inc Selective circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168864A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Radio receiver/transmitter filters
GB2173660A (en) * 1985-03-28 1986-10-15 Multitone Electronics Plc Paging receiver
CN107425923A (en) * 2017-09-04 2017-12-01 林宇 The magnetic fibre receiver in 1G-1 thousand ten thousand G more than fine for magnetic long broadband
CN107425923B (en) * 2017-09-04 2024-05-14 林宇 Magnetic fiber receiver and too wide magnetic fiber receiver

Also Published As

Publication number Publication date
BE722092A (en) 1969-04-10
AT284911B (en) 1970-10-12
NL6812574A (en) 1969-04-22
FR1588419A (en) 1970-04-10
DE1591583B1 (en) 1971-10-14

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