GB828688A - Improvements in or relating to controlled transistor amplifiers - Google Patents
Improvements in or relating to controlled transistor amplifiersInfo
- Publication number
- GB828688A GB828688A GB35401/55A GB3540155A GB828688A GB 828688 A GB828688 A GB 828688A GB 35401/55 A GB35401/55 A GB 35401/55A GB 3540155 A GB3540155 A GB 3540155A GB 828688 A GB828688 A GB 828688A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistors
- relating
- controlled transistor
- transistor amplifiers
- dec
- 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
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L5/00—Automatic control of voltage, current, or power
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/46—Volume control
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
- H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F99/00—Subject matter not provided for in other groups of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Electrophonic Musical Instruments (AREA)
- Toys (AREA)
Abstract
828,688. Electrophonic musical instruments. PHILIPS ELECTRICAL INDUSTRIES Ltd. Dec. 9, 1955 [Dec. 13, 1954], No. 35401/55. Class 88 (2). [Also in Groups XV, XL (b) and XL (c)] In an instrument employing transistors, a discharge tube 4, Fig. 9, is arranged to illuminate the transistors and prevent them from oscillating. Upon a player interposing his finger between the light source and one of the transistors the transistor commences to oscillate and generate a tone (see Group XL (c)).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL337573X | 1954-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB828688A true GB828688A (en) | 1960-02-24 |
Family
ID=19784593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35401/55A Expired GB828688A (en) | 1954-12-13 | 1955-12-09 | Improvements in or relating to controlled transistor amplifiers |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS335064B1 (en) |
| BE (1) | BE543553A (en) |
| CH (1) | CH337573A (en) |
| DE (1) | DE1046100B (en) |
| FR (1) | FR1144663A (en) |
| GB (1) | GB828688A (en) |
| NL (2) | NL193174A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697851A (en) * | 1950-06-06 | 1953-09-30 | British Thomson Houston Co Ltd | Improvements relating to the utilisation of the photo-electric effect in semi-conductors |
-
0
- BE BE543553D patent/BE543553A/xx unknown
- NL NL107295D patent/NL107295C/xx active
- NL NL193174D patent/NL193174A/xx unknown
-
1955
- 1955-12-09 DE DEN11575A patent/DE1046100B/en active Pending
- 1955-12-09 GB GB35401/55A patent/GB828688A/en not_active Expired
- 1955-12-10 JP JP3210055A patent/JPS335064B1/ja active Pending
- 1955-12-12 FR FR1144663D patent/FR1144663A/en not_active Expired
- 1955-12-12 CH CH337573D patent/CH337573A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1046100B (en) | 1958-12-11 |
| JPS335064B1 (en) | 1968-07-08 |
| CH337573A (en) | 1959-04-15 |
| NL107295C (en) | |
| FR1144663A (en) | 1957-10-16 |
| NL193174A (en) | |
| BE543553A (en) |
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