GB984573A - Improvements in and relating to electrical impedance networks simulating inductance - Google Patents

Improvements in and relating to electrical impedance networks simulating inductance

Info

Publication number
GB984573A
GB984573A GB30404/61A GB3040461A GB984573A GB 984573 A GB984573 A GB 984573A GB 30404/61 A GB30404/61 A GB 30404/61A GB 3040461 A GB3040461 A GB 3040461A GB 984573 A GB984573 A GB 984573A
Authority
GB
United Kingdom
Prior art keywords
inductance
base
simulated
earth
collector
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
GB30404/61A
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford Corp
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 Philco Ford Corp filed Critical Philco Ford Corp
Publication of GB984573A publication Critical patent/GB984573A/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
    • H03H11/46—One-port networks
    • H03H11/48—One-port networks simulating reactances
    • 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
    • G06G7/48—Analogue computers for specific processes, systems or devices, e.g. simulators
    • G06G7/62—Analogue computers for specific processes, systems or devices, e.g. simulators for electric systems or apparatus
    • 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
    • H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Networks Using Active Elements (AREA)

Abstract

984,573. Frequency modulation; transistor oscillator circuits. PHILCO CORPORATION. Aug. 23, 1961 [Aug. 23, 1960], No. 30404/61. Headings H3R and H3T. A network simulating a high Q inductor comprises (Fig. 1) a transistor 10 with collector to base feedback resistor 11 and capacitor 12 connected between base and earth; the emitter being returned to earth over resistor 13 in series with low Q inductor 18. It is shown that if the latter is proportioned so that the base current Ib lags base voltage Vb so that collector current Ic is in phase with Ib and in lagging quadrature with Vc, a simulated high Q inductance appears at 16, 17 between collector and earth (Figs. 2, 3, not shown) and that by increasing the inductance of 18, Ic can be made to lag Vc by more than 90 degrees to present a simulated negative resistance component, so that if a capacitance is connected across 16, 17, selfoscillation occurs at frequency determined by the capacitance and the simulated inductance. In Fig. 4 the low Q inductance 18 is simulated by a transistor 22 whose collector and emitter are connected between the emitter of transistor 19 and earth, having a resistance 23 between collector and base and capacitance 24 between base and earth; the overall circuit simulating a high Q inductance at 25, 26. Adjustment of the values 23, 24 enable a negative resistance component to be obtained, so that self-oscillation ensues at frequency determined by the simulated inductance and a capacitance across 25, 26.
GB30404/61A 1960-08-23 1961-08-23 Improvements in and relating to electrical impedance networks simulating inductance Expired GB984573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51443A US3152309A (en) 1960-08-23 1960-08-23 Simulated high-q inductor

Publications (1)

Publication Number Publication Date
GB984573A true GB984573A (en) 1965-02-24

Family

ID=21971354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30404/61A Expired GB984573A (en) 1960-08-23 1961-08-23 Improvements in and relating to electrical impedance networks simulating inductance

Country Status (2)

Country Link
US (1) US3152309A (en)
GB (1) GB984573A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343003A (en) * 1964-01-24 1967-09-19 Itt Transistor inductor
FR1424482A (en) * 1964-12-01 1966-01-14 Csf inductive reactance integrated electric circuit element
DE1616690C3 (en) * 1965-02-08 1974-09-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for reducing the inherent losses of inductances, especially in telephone switching systems
US3397363A (en) * 1967-01-03 1968-08-13 Zenith Radio Corp Controllable simulated inductor using tetrode transistors
US3483477A (en) * 1967-10-25 1969-12-09 Fairchild Camera Instr Co Broadband amplifier with semiconductor interstage element
US3680011A (en) * 1970-08-03 1972-07-25 Stanford Research Inst Loss cancelling resonator and filters
US3732441A (en) * 1971-05-07 1973-05-08 Zenith Radio Corp Surface wave integratable filter for coupling a signal source to a load
US3974399A (en) * 1974-05-09 1976-08-10 Yagi Antenna Co., Ltd. Active high Q filter using transistor
FR2709027B1 (en) * 1993-08-11 1995-10-20 Liger Rene Detector amplifier for standby system.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757629A (en) * 1954-01-15 1956-09-19 Marconi Wireless Telegraph Co Improvements in or relating to reactance valve circuit arrangements
US2870421A (en) * 1954-05-03 1959-01-20 Rca Corp Transistor reactance circuit
US2948869A (en) * 1955-12-27 1960-08-09 Raytheon Co Reactance networks
BE554541A (en) * 1956-01-28
US2914684A (en) * 1957-03-18 1959-11-24 Collins Radio Co Transistor phase detector

Also Published As

Publication number Publication date
US3152309A (en) 1964-10-06

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