GB912726A - Improvements in or relating to transistor circuit arrangements - Google Patents
Improvements in or relating to transistor circuit arrangementsInfo
- Publication number
- GB912726A GB912726A GB1043461A GB1043461A GB912726A GB 912726 A GB912726 A GB 912726A GB 1043461 A GB1043461 A GB 1043461A GB 1043461 A GB1043461 A GB 1043461A GB 912726 A GB912726 A GB 912726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- pump
- frequency
- tuned
- transistor
- 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
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/191—Tuned amplifiers
-
- 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
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F7/00—Parametric amplifiers
- H03F7/04—Parametric amplifiers using variable-capacitance element; using variable-permittivity element
Abstract
912,726. Parametric amplifiers. TELEFUNKEN G.m.b.H. March 22, 1961 [March 31, 1960], No. 10434/61. Class 40 (9). A transistor amplifier includes means for applying a pump frequency to vary the collector blocking layer capacity so as to produce parametric amplification. As shown, the signal is applied via a tuned input circuit 1 to the emitterbase circuit of the transistor 3, the output from the collector-emitter circuit being emitted via a tuned circuit 2. The pump frequency is applied across the collector base circuit and may be twice the signal frequency. If the pump frequency is different from this a circuit 5 tuned to the difference between the pump and signal frequencies must be provided. In a modification, Fig. 2 (not shown), the pump source is connected across the transistor output circuit. The circuit may also be used as a mixer, the output being taken at a frequency equal to the difference between the pump and signal frequencies.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET18169A DE1122991B (en) | 1960-03-31 | 1960-03-31 | Matched transistor amplifier stage with parametric de-damping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB912726A true GB912726A (en) | 1962-12-12 |
Family
ID=7548847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1043461A Expired GB912726A (en) | 1960-03-31 | 1961-03-22 | Improvements in or relating to transistor circuit arrangements |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH406327A (en) |
| DE (1) | DE1122991B (en) |
| GB (1) | GB912726A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362691B (en) * | 2022-03-17 | 2022-05-24 | 壹甲子(成都)通讯有限公司 | AC small signal driving information pick-up circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE921955C (en) * | 1953-01-23 | 1955-01-07 | Hubert Eishauer | Process for the production of recesses in concrete structures or the like. |
| FR1078626A (en) * | 1953-04-03 | 1954-11-19 | Westinghouse Freins & Signaux | Solid state amplifier system |
| DE1073557B (en) * | 1959-04-30 | 1960-01-21 |
-
1960
- 1960-03-31 DE DET18169A patent/DE1122991B/en active Pending
-
1961
- 1961-02-21 CH CH206161A patent/CH406327A/en unknown
- 1961-03-22 GB GB1043461A patent/GB912726A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH406327A (en) | 1966-01-31 |
| DE1122991B (en) | 1962-02-01 |
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