GB2261143A - Apparatus for filtering and amplifying an oscillator - Google Patents

Apparatus for filtering and amplifying an oscillator

Info

Publication number
GB2261143A
GB2261143A GB9225669A GB9225669A GB2261143A GB 2261143 A GB2261143 A GB 2261143A GB 9225669 A GB9225669 A GB 9225669A GB 9225669 A GB9225669 A GB 9225669A GB 2261143 A GB2261143 A GB 2261143A
Authority
GB
United Kingdom
Prior art keywords
oscillator
radiotelephone
transmitter
buffer amplifier
amplifying
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.)
Withdrawn
Application number
GB9225669A
Other versions
GB9225669D0 (en
Inventor
Alexander W Hietala
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB9225669D0 publication Critical patent/GB9225669D0/en
Publication of GB2261143A publication Critical patent/GB2261143A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/005—Reducing noise, e.g. humm, from the supply
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1206—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification
    • H03B5/1218—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device using multiple transistors for amplification the generator being of the balanced type
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Transceivers (AREA)

Abstract

A radiotelephone (208) for use in a radiotelephone system, the radiotelephone including an oscillator (203) and a buffer amplifier (211) and a transmitter (206). The transmitter (206) is pulsed, causing audio frequency voltage variations in the power supply (207). The radiotelephone (208) generates power and a bias signal for the oscillator (203). The buffer amplifier (211) and the oscillator (203) are in a "stacked" configuration. The buffer amplifier (211) diminishes the audio frequency voltage variations caused by the pulsed transmitter in the power and bias signals generated for the oscillator (203).
GB9225669A 1991-04-15 1992-12-08 Apparatus for filtering and amplifying an oscillator Withdrawn GB2261143A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68524891A 1991-04-15 1991-04-15
PCT/US1992/002370 WO1992019047A1 (en) 1991-04-15 1992-03-24 Apparatus for filtering and amplifying an oscillator

Publications (2)

Publication Number Publication Date
GB9225669D0 GB9225669D0 (en) 1993-02-24
GB2261143A true GB2261143A (en) 1993-05-05

Family

ID=24751375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9225669A Withdrawn GB2261143A (en) 1991-04-15 1992-12-08 Apparatus for filtering and amplifying an oscillator

Country Status (5)

Country Link
JP (1) JPH05508526A (en)
CA (1) CA2078231A1 (en)
DE (1) DE4291072T1 (en)
GB (1) GB2261143A (en)
WO (1) WO1992019047A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8952765B2 (en) * 2012-03-23 2015-02-10 Mks Instruments, Inc. System and methods of bimodal automatic power and frequency tuning of RF generators

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959744A (en) * 1975-02-26 1976-05-25 Time Computer, Inc. CMOS oscillator having bias circuit outside oscillator feedback loop
US4523159A (en) * 1983-12-28 1985-06-11 Zenith Electronics Corporation Microwave oscillator and single balanced mixer for satellite television receiver
US4626802A (en) * 1984-12-24 1986-12-02 Motorola, Inc. GaAs FET oscillator noise reduction circuit
US5027429A (en) * 1988-08-12 1991-06-25 Nec Corporation Frequency modulator utilizing frequency synthesizer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3631068A1 (en) * 1986-09-12 1988-03-24 Hagenuk Telecom Gmbh Cordless telephone system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959744A (en) * 1975-02-26 1976-05-25 Time Computer, Inc. CMOS oscillator having bias circuit outside oscillator feedback loop
US4523159A (en) * 1983-12-28 1985-06-11 Zenith Electronics Corporation Microwave oscillator and single balanced mixer for satellite television receiver
US4626802A (en) * 1984-12-24 1986-12-02 Motorola, Inc. GaAs FET oscillator noise reduction circuit
US5027429A (en) * 1988-08-12 1991-06-25 Nec Corporation Frequency modulator utilizing frequency synthesizer

Also Published As

Publication number Publication date
CA2078231A1 (en) 1992-10-16
GB9225669D0 (en) 1993-02-24
WO1992019047A1 (en) 1992-10-29
DE4291072T1 (en) 1993-04-01
JPH05508526A (en) 1993-11-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)