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
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Acoustics & Sound (AREA)
- Multimedia (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) | NL107295C (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 NL193174D patent/NL193174A/xx unknown
- NL NL107295D patent/NL107295C/xx active
-
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 |
|---|---|
| NL107295C (en) | |
| JPS335064B1 (en) | 1968-07-08 |
| FR1144663A (en) | 1957-10-16 |
| DE1046100B (en) | 1958-12-11 |
| CH337573A (en) | 1959-04-15 |
| BE543553A (en) | |
| NL193174A (en) |
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