GB8505935D0 - Amplifier - Google Patents
AmplifierInfo
- Publication number
- GB8505935D0 GB8505935D0 GB858505935A GB8505935A GB8505935D0 GB 8505935 D0 GB8505935 D0 GB 8505935D0 GB 858505935 A GB858505935 A GB 858505935A GB 8505935 A GB8505935 A GB 8505935A GB 8505935 D0 GB8505935 D0 GB 8505935D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
- H02M7/2195—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration the switches being synchronously commutated at the same frequency of the AC input voltage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08505935A GB2163312B (en) | 1984-08-14 | 1985-03-07 | Amplifier |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08420592A GB2163320B (en) | 1984-08-14 | 1984-08-14 | Telephone circuit |
GB08505935A GB2163312B (en) | 1984-08-14 | 1985-03-07 | Amplifier |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8505935D0 true GB8505935D0 (en) | 1985-04-11 |
GB2163312A GB2163312A (en) | 1986-02-19 |
GB2163312B GB2163312B (en) | 1988-01-27 |
Family
ID=26288115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08505935A Expired GB2163312B (en) | 1984-08-14 | 1985-03-07 | Amplifier |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2163312B (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2221773C2 (en) * | 1972-05-04 | 1979-04-05 | Loewe Opta Gmbh, 1000 Berlin | Circuit for switching on stored constant electrical abstinence voltages for the selection of preset stations in telecommunications equipment |
US3875522A (en) * | 1973-04-13 | 1975-04-01 | Signetics Corp | Integrated direct-coupled electronic attenuator |
JPS5574116U (en) * | 1978-11-15 | 1980-05-22 |
-
1985
- 1985-03-07 GB GB08505935A patent/GB2163312B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2163312A (en) | 1986-02-19 |
GB2163312B (en) | 1988-01-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
746 | Register noted 'licences of right' (sect. 46/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930814 |