GB1323712A - Electrical networks - Google Patents

Electrical networks

Info

Publication number
GB1323712A
GB1323712A GB5669972A GB1323712DA GB1323712A GB 1323712 A GB1323712 A GB 1323712A GB 5669972 A GB5669972 A GB 5669972A GB 1323712D A GB1323712D A GB 1323712DA GB 1323712 A GB1323712 A GB 1323712A
Authority
GB
United Kingdom
Prior art keywords
transistor
current
increases
negative
negative impedance
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
GB5669972A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Publication of GB1323712A publication Critical patent/GB1323712A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
    • H04B3/18—Control of transmission; Equalising characterised by the negative-impedance network used wherein the network comprises semiconductor devices
    • 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
    • H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
    • H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
    • H03B7/06—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being semiconductor device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/46—One-port networks
    • H03H11/52—One-port networks simulating negative resistances

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)

Abstract

1323712 Negative impedance circuits POST OFFICE 9 Dec 1970 [2 Jan 1970] 56699/72 Heading H3T A negative impedance circuit comprises a bipolar transistor T3 the bias for which is provided by a circuit including a field effect transistor T4 connected between the base and emitter of transistor T3. For small values of current I 2 , transistor T3 is turned off, and all current flows through the path R3, T4, R4. As I 2 increases the source-drain resistance of T4 increases and T3 turns on. The current through R3 then decreases with increasing I 2 and since most of voltage V2 is made up of the voltage drop across R3, the characteristic of the circuit shows a negative dynamic resistance region.
GB5669972A 1970-01-02 1970-01-02 Electrical networks Expired GB1323712A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB19170 1970-01-02
GB5669972 1970-01-02

Publications (1)

Publication Number Publication Date
GB1323712A true GB1323712A (en) 1973-07-18

Family

ID=26235753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5669972A Expired GB1323712A (en) 1970-01-02 1970-01-02 Electrical networks

Country Status (1)

Country Link
GB (1) GB1323712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338582A (en) * 1978-09-29 1982-07-06 Rca Corporation Electronically tunable resonator circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338582A (en) * 1978-09-29 1982-07-06 Rca Corporation Electronically tunable resonator circuit

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee