GB897561A - Improvements in or relating to receiver circuit arrangements - Google Patents
Improvements in or relating to receiver circuit arrangementsInfo
- Publication number
- GB897561A GB897561A GB4187859A GB4187859A GB897561A GB 897561 A GB897561 A GB 897561A GB 4187859 A GB4187859 A GB 4187859A GB 4187859 A GB4187859 A GB 4187859A GB 897561 A GB897561 A GB 897561A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- circuit
- mixer
- signal
- 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
- 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
- H04B1/26—Circuits for superheterodyne receivers
- H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
Abstract
897,561. Transistor radio receiving circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Dec. 9, 1959 [Dec. 12, 1958], No. 41878/59. Class 40(6). A receiver circuit includes a transistor in reflex connection, into the emitter circuit of which the aerial signal is introduced, and a second transistor mixer oscillator stage for producing an intermediate frequency signal to be returned to the base of the first transistor and again amplified. The input from the aerial is applied over tuned circuit 1 to the transistor 2, operating in the common base mode. The amplified signal from transistor 2 is fed to tuned circuit 3 in the emitter lead of transistor 4 which operates as a selfoscillating mixer, feedback of the local oscillator frequency being made over circuit 5. The I.F. output circuit 6 is connected to the base of transistor 2 operating in the common emitter mode, the amplified I.F. signal from transistor 2 being obtained from the tuned circuit 7. A circuit 8, series resonant at the I.F. is included in the emitter lead of mixer transistor 4. Overdriving of the mixer is avoided by A.G.C. of transistor 2 by means of a variable supply current fed to terminals 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP0015971 | 1958-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB897561A true GB897561A (en) | 1962-05-30 |
Family
ID=7365830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4187859A Expired GB897561A (en) | 1958-12-12 | 1959-12-09 | Improvements in or relating to receiver circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB897561A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252215A (en) * | 1990-11-07 | 1992-07-29 | Nokia Mobile Phones Ltd | Circuit for simultaneous amplification of signals with different frequencies |
-
1959
- 1959-12-09 GB GB4187859A patent/GB897561A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252215A (en) * | 1990-11-07 | 1992-07-29 | Nokia Mobile Phones Ltd | Circuit for simultaneous amplification of signals with different frequencies |
| GB2252215B (en) * | 1990-11-07 | 1995-04-12 | Nokia Mobile Phones Ltd | Circuit for simultaneous amplification of signals with different frequencies |
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