GB1328940A - Amplifier circuits - Google Patents
Amplifier circuitsInfo
- Publication number
- GB1328940A GB1328940A GB3779772A GB3779772A GB1328940A GB 1328940 A GB1328940 A GB 1328940A GB 3779772 A GB3779772 A GB 3779772A GB 3779772 A GB3779772 A GB 3779772A GB 1328940 A GB1328940 A GB 1328940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistors
- resistor
- input
- output
- voltage feedback
- 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
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/347—Negative-feedback-circuit arrangements with or without positive feedback using transformers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/12—Arrangements for reducing cross-talk between channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
- Networks Using Active Elements (AREA)
- Picture Signal Circuits (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
1328940 Transistor amplifying circuits HEWLETT-PACKARD CO 14 Aug 1972 [23 Aug 1971] 37797/72 Heading H3T In a transistor amplifier for a cable television system both current and voltage feedback are applied, and the loop phase shift is of the order of 90 degrees. In one embodiment, voltage feedback is applied by means of resistors BE1, RF1, Fig. 4, and current feedback by means of resistors RE2, RF2; a padding resistor RB is utilised to make the input impedance of the amplifier match the impedance of the input cable 25. The phase shift of 90 degrees is introduced by the output transistor 26. In a second embodiment, voltage feedback is produced by means of resistors RE1, RF1, Fig. 5 a D.C. blocking capacitor being placed in series with resistor RF1. Current feedback is introduced by resistors R1, RE2, RF2, resistor RE2 being in parallel with resistor R, via a D.C. blocking capacitor. The input and output are via transformers 41, 42 respectively. A pushpull embodiment is also described in the Specification (Fig. 6, not shown) comprising two such circuits together with phase-splitting input and output transformers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17389871A | 1971-08-23 | 1971-08-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1328940A true GB1328940A (en) | 1973-09-05 |
Family
ID=22633982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3779772A Expired GB1328940A (en) | 1971-08-23 | 1972-08-14 | Amplifier circuits |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS4830811A (en) |
DE (1) | DE2241060B2 (en) |
GB (1) | GB1328940A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53101252A (en) * | 1977-02-16 | 1978-09-04 | Sony Corp | Feedback-type amplifier circuit |
US4220931A (en) * | 1978-05-12 | 1980-09-02 | Northern Telecom Systems Corporation | Composite video automatic gain control amplifier |
US4179314A (en) * | 1978-12-11 | 1979-12-18 | Kawecki Berylco Industries, Inc. | Treatment of beryllium-copper alloy and articles made therefrom |
US4394185A (en) * | 1982-03-30 | 1983-07-19 | Cabot Berylco, Inc. | Processing for copper beryllium alloys |
US4774478A (en) * | 1986-09-19 | 1988-09-27 | Tektronix, Inc. | Feedback amplifier compensation circuitry |
-
1972
- 1972-08-14 GB GB3779772A patent/GB1328940A/en not_active Expired
- 1972-08-21 DE DE19722241060 patent/DE2241060B2/en active Pending
- 1972-08-23 JP JP47084232A patent/JPS4830811A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2241060A1 (en) | 1973-03-01 |
JPS4830811A (en) | 1973-04-23 |
DE2241060B2 (en) | 1975-11-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1533266A (en) | Equalization circuits | |
GB766744A (en) | Semi-conductor signal receiving system | |
GB1513828A (en) | Variable gain amplifiers | |
GB1328940A (en) | Amplifier circuits | |
GB1414866A (en) | Logarithmic amplifying system | |
GB945379A (en) | Binary trigger | |
GB940853A (en) | Voltage sensitive regulating or control circuit | |
GB1098979A (en) | Improvements in or relating to high frequency transistor amplifiers | |
GB1257490A (en) | ||
GB1162044A (en) | Differential Amplifier | |
GB1037615A (en) | Apparatus for recording and playing back colour and monochrome television signals | |
GB1192905A (en) | An Oscillator Circuit | |
GB1173885A (en) | Voltage-Controlled Oscillator with Time-Ratio Control | |
GB996460A (en) | Compensating circuit | |
GB1315108A (en) | Chrominance amplifier | |
GB1238698A (en) | ||
GB1223053A (en) | Improvements in or relating to balanced to unbalanced coupling circuits | |
GB1088251A (en) | Improvements in or relating to transistor amplifiers | |
GB1259013A (en) | ||
GB748204A (en) | Improvements in transistor integrating circuits | |
GB1188049A (en) | Amplifier Circuit | |
GB1152278A (en) | Improvements in or relating to Mixers and Frequency Changers | |
GB1245163A (en) | Multiterminal networks | |
GB1246381A (en) | Improvements in or relating to telephone instrument circuit arrangements | |
GB1057634A (en) | Circuit arrangements for the transmission of signals over an unbalanced circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |