GB1120592A - Improvements in or relating to tuned circuits employing transistors - Google Patents
Improvements in or relating to tuned circuits employing transistorsInfo
- Publication number
- GB1120592A GB1120592A GB587666A GB587666A GB1120592A GB 1120592 A GB1120592 A GB 1120592A GB 587666 A GB587666 A GB 587666A GB 587666 A GB587666 A GB 587666A GB 1120592 A GB1120592 A GB 1120592A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- transistor
- transistors
- phase
- emitter
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
- H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
-
- 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
-
- 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
- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Bipolar Integrated Circuits (AREA)
- Amplifiers (AREA)
- Rectifiers (AREA)
Abstract
1,120,592. Transistor circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 10 Feb., 1966 [13 Feb., 1965], No. 5876/66. Heading H3T. In an arrangement simulating a resonant circuit, the collector of each of two transistors 1, 2 is cross-connected to the base of the other, phase-shifting elements being connected to the transistors in such a manner as to obtain frequency-dependent positive feedback which provides the resonant characteristic. The arrangement is characterized in that the collector circuit of each transistor includes a rectifier 3, 5 polarized in the forward direction and having applied across it a voltage which compensates for the voltage drop across the emitter-base path of the respective transistor As shown, the phase-shifting elements comprise capacitor 7 which is equivalent to equal capacitors of double value connected across resistors 4, 6, and series R.C. circuit 8, 9 interconnecting the emitters, the circuits of which comprise resistors 10, 11 of value high relative to the emitter impedances of the transistors. The Specification also describes a second embodiment (Fig. 2, not shown), utilizing transistors of opposite conductivity type, in which the phase-shifting elements comprise parallel-connected resistance and capacitance (6, 15) in the collector circuit of one transistor and a series-connected R.C. circuit (16, 17) shunting the emitter circuit resistor of the other transistor. The arrangement may be adjusted so as to generate continuous oscillations.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL6501840A NL6501840A (en) | 1965-02-13 | 1965-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1120592A true GB1120592A (en) | 1968-07-17 |
Family
ID=19792364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB587666A Expired GB1120592A (en) | 1965-02-13 | 1966-02-10 | Improvements in or relating to tuned circuits employing transistors |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE676395A (en) |
DE (1) | DE1491974C3 (en) |
ES (1) | ES322903A1 (en) |
GB (1) | GB1120592A (en) |
NL (1) | NL6501840A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3983512A (en) * | 1974-08-27 | 1976-09-28 | Feedback Instruments Limited | Current controlled electrical circuits |
WO1995001671A1 (en) * | 1993-06-29 | 1995-01-12 | Sican, Gesellschaft Für Silizium-Anwendungen Und Cad/Cat Niedersachsen Mbh | Monolithically integrated, tunable resonant circuit and circuitry made thereof |
GB2307124A (en) * | 1995-11-01 | 1997-05-14 | Plessey Semiconductors Ltd | Active filter circuit having stacked stages |
US5847605A (en) * | 1995-11-01 | 1998-12-08 | Plessey Semiconductors Limited | Folded active filter |
GB2352102A (en) * | 1999-07-16 | 2001-01-17 | Ericsson Telefon Ab L M | Integrated circuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3277410B2 (en) * | 1993-06-25 | 2002-04-22 | ソニー株式会社 | Power-on reset circuit |
-
1965
- 1965-02-13 NL NL6501840A patent/NL6501840A/xx unknown
-
1966
- 1966-02-10 DE DE19661491974 patent/DE1491974C3/en not_active Expired
- 1966-02-10 GB GB587666A patent/GB1120592A/en not_active Expired
- 1966-02-11 BE BE676395D patent/BE676395A/xx unknown
- 1966-02-11 ES ES0322903A patent/ES322903A1/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3983512A (en) * | 1974-08-27 | 1976-09-28 | Feedback Instruments Limited | Current controlled electrical circuits |
WO1995001671A1 (en) * | 1993-06-29 | 1995-01-12 | Sican, Gesellschaft Für Silizium-Anwendungen Und Cad/Cat Niedersachsen Mbh | Monolithically integrated, tunable resonant circuit and circuitry made thereof |
US5949295A (en) * | 1993-06-29 | 1999-09-07 | Sican, Gesellschaft Fur Silizium-Anwendungen Und Cad/Cat Niedersachsen Mbh | Integratable tunable resonant circuit for use in filters and oscillators |
GB2307124A (en) * | 1995-11-01 | 1997-05-14 | Plessey Semiconductors Ltd | Active filter circuit having stacked stages |
US5847605A (en) * | 1995-11-01 | 1998-12-08 | Plessey Semiconductors Limited | Folded active filter |
GB2307124B (en) * | 1995-11-01 | 1999-04-28 | Plessey Semiconductors Ltd | Active filter stack |
US5912587A (en) * | 1995-11-01 | 1999-06-15 | Mitel Semiconductor Limited | Active filter stack |
GB2352102A (en) * | 1999-07-16 | 2001-01-17 | Ericsson Telefon Ab L M | Integrated circuit |
US6577212B1 (en) | 1999-07-16 | 2003-06-10 | Telefonaktiebolaget L M Ericsson (Publ) | Integrated circuit |
GB2352102B (en) * | 1999-07-16 | 2004-06-16 | Ericsson Telefon Ab L M | Integrated circuit |
Also Published As
Publication number | Publication date |
---|---|
NL6501840A (en) | 1966-08-15 |
ES322903A1 (en) | 1966-11-16 |
BE676395A (en) | 1966-08-11 |
DE1491974A1 (en) | 1969-10-02 |
DE1491974B2 (en) | 1973-09-06 |
DE1491974C3 (en) | 1974-03-28 |
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