GB1207521A - Improvements in and relating to a condition responsive phase shift oscillator - Google Patents

Improvements in and relating to a condition responsive phase shift oscillator

Info

Publication number
GB1207521A
GB1207521A GB3892267A GB3892267A GB1207521A GB 1207521 A GB1207521 A GB 1207521A GB 3892267 A GB3892267 A GB 3892267A GB 3892267 A GB3892267 A GB 3892267A GB 1207521 A GB1207521 A GB 1207521A
Authority
GB
United Kingdom
Prior art keywords
phase shift
circuit
transistor
capacitance
relating
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
GB3892267A
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.)
Honeywell Inc
Original Assignee
Honeywell 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 Honeywell Inc filed Critical Honeywell Inc
Priority to GB3892267A priority Critical patent/GB1207521A/en
Publication of GB1207521A publication Critical patent/GB1207521A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/16—Networks for phase shifting
    • H03H11/20—Two-port phase shifters providing an adjustable phase shift
    • 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
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/24—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being semiconductor device

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

1,207,521. Transistor oscillator circuits; keying oscillators. HONEYWELL Inc. 13 Sept., 1967, No. 38922/67. Headings H3T and H3R. [Also in Division G1] An oscillator comprises a mismatched distributed resistance/capacitance phase shift element 23, Fig. 2, and a coupling element connected between the output and input of an amplifier formed by transistors 20 and 21. In Fig. 2 part of the feedback circuit is shunted by a variable capacitance, shown as a transistor 30 the capacitance of which depends on the voltage at terminal 29, and it is shown that the phase shift is 0 degrees or - 180 degrees according to whether the ratio of the capacitances is more or less 17À7, and the circuit oscillates or not accordingly. The circuit may be constructed as an integrated circuit, Fig. 4 (not shown). In a modified circuit, Fig. 3 (not shown), the collector of transistor 21 is connected to a separate tapping on element 23 from that connected to transistor 30. The change of phase shift may be produced by a variable resistance connected to the capacitive terminal of the phase shift element, Fig. 5 (not shown). In another arrangement, Fig. 7, the RC line 123 is formed of semi-conductive material exhibiting a piezo-resistive effect so that the circuit oscillates continuously at a frequency dependent on pressure.
GB3892267A 1967-09-13 1967-09-13 Improvements in and relating to a condition responsive phase shift oscillator Expired GB1207521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3892267A GB1207521A (en) 1967-09-13 1967-09-13 Improvements in and relating to a condition responsive phase shift oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3892267A GB1207521A (en) 1967-09-13 1967-09-13 Improvements in and relating to a condition responsive phase shift oscillator

Publications (1)

Publication Number Publication Date
GB1207521A true GB1207521A (en) 1970-10-07

Family

ID=10406503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3892267A Expired GB1207521A (en) 1967-09-13 1967-09-13 Improvements in and relating to a condition responsive phase shift oscillator

Country Status (1)

Country Link
GB (1) GB1207521A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036820A3 (en) * 2005-09-30 2007-10-18 Nxp Bv Oscillator based on piezoresistive resonators

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036820A3 (en) * 2005-09-30 2007-10-18 Nxp Bv Oscillator based on piezoresistive resonators
US7898148B2 (en) 2005-09-30 2011-03-01 Nxp B.V. Oscillator based on piezoresistive resonators

Similar Documents

Publication Publication Date Title
GB1152367A (en) Integrated Electronic Circuit
GB1279274A (en) Electronically controlled timepiece
US2764687A (en) Transistor automatic frequency control
GB1481630A (en) Variable frequency oscillators
GB1412549A (en) Piezo-electric crystal oscillators
GB1121439A (en) Electronic tunable oscillator circuit
GB1429257A (en) Timepiece having a high frequency oxcillator
GB1207521A (en) Improvements in and relating to a condition responsive phase shift oscillator
GB1192905A (en) An Oscillator Circuit
GB1100751A (en) Improvements in or relating to tuning arrangements
GB855985A (en) Improvements in or relating to transistor oscillation generators
GB1093538A (en) Improvements in or relating to switched frequency oscillators
GB1172642A (en) Oscillators.
GB1153267A (en) Filter Circuit
US3757142A (en) Combined threshold detector and multivibrator circuit
GB1387984A (en) Transistor oscillators
GB1093164A (en) Improvements in or relating to electric oscillators
GB1389203A (en) Transistorised oscillators
US3544809A (en) Multifunctional circuit
GB1345550A (en) Procision astable multivibrator
GB925395A (en) Improvements in transistor oscillator
US2913671A (en) High input impedance transistor amplifier
GB1077877A (en) Improvements in crystal oscillators
GB1245163A (en) Multiterminal networks
GB880728A (en) Improvements in and relating to circuits embodying reactive devices

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees