GB911334A - Improvements in or relating to parametric amplifier arrangements - Google Patents
Improvements in or relating to parametric amplifier arrangementsInfo
- Publication number
- GB911334A GB911334A GB3193560A GB3193560A GB911334A GB 911334 A GB911334 A GB 911334A GB 3193560 A GB3193560 A GB 3193560A GB 3193560 A GB3193560 A GB 3193560A GB 911334 A GB911334 A GB 911334A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- line
- output
- diode
- hybrid
- 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
- H03F7/00—Parametric amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F7/00—Parametric amplifiers
- H03F7/04—Parametric amplifiers using variable-capacitance element; using variable-permittivity element
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
911,334. Parametric amplifiers. TELEFUNKEN G.m.b.H. Sept. 19, 1960 [Sept. 19, 1959], No. 31935/60. Class 40 (9). A parametric amplifier comprises filters and hybrid junctions to separate the pump, signal and idler frequencies. The variable reactance may be inductive or capacitative. In the embodiment described the reactance is a negatively-biased semiconductor diode. Amplifier stages may be connected in series or in parallel. Transformers and terminating impedances are indicated throughout by the reference letters T and Z. Single-stage amplifeer (Figs. 1, 2).- A signal at frequency # 1 is fed to a diode D over line L 1 and low-pass filter TP. The pumping frequency fp is fed to the diode D from source PX through parallel paths including filters F 1 , F 2 , hybrid junctions B 2 , B 1 and a high-pass filter HP which passes the pumping frequency fp and the idler frequency f 2 , but not the signal frequency f 1 . The idler frequeney f 2 is reflected by filters F 1 which are staggered by #<SP>2</SP>/4 so that they combine in the fourth line L 2 of the hybrid B 1 . If the output is required at frequency # 2 , line L 2 is terminated without reflection by a ferrite isolator J, a filter F 2 (accepting f 2 ) and a terminating impedance Z. If the output is required at frequency f 1 , the isolator is replaced by the characteristic impedance Z of the line L 2 and the output at frequency f 1 is taken from line L 1 <SP>1</SP> associated with a timing device T 1 <SP>1</SP>. In a practical form, Fig. 2, the line L 1 is a coaxial line and the tuning device T 1 is a further line L 12 tuned by a sliding piston S 1 . Two annular condensers constitute the tuning device Tp. The line L 2 p is a waveguide with a narrow face b and a broad face at right-angles thereto. This guide is closed and tuned by a piston S 2 . The diode D is connected between the wall of the guide and the low-pass filter TP. Each of the hybrid junctions B 1 , B 2 is in the form of a magic T. The fourth arm of each magic T is perpendicular to the drawing plane but is turned down into the plane for the purpose of illustration. Diaphragms B and tuning members A constitute the filters F 1 . Parallel stages (Fig. 3).-Two diodes in assemblies P<SP>1</SP>, P<SP>11</SP> corresponding to assembly P of Fig. 1 are fed with signal frequency f 1 from terminal 1 and hybrid junction B 11 . Each diode is also fed with pumping frequency fp from a common source PX via hybrid junction arrange. ments B<SP>1</SP> 1 , B<SP>1</SP> 2 and B<SP>11</SP> 1 , B<SP>11</SP> 2 . An output at signal frequency may be taken from line L<SP>1</SP> 1 . The two lines L 2 <SP>1</SP>, L 2 <SP>11</SP> feed a common hybrid junction B 22 to give an output at the idler frequency f 2 on terminals 2, 2<SP>1</SP>. Quarter-wave loops are included when necessary to keep the waves in phase. Series stages.-Two arrangements like the arrangement shown in Fig. 3 may be connected as shown in outline in Fig. 4. Thus the amplified output at signal frequency f 1 on terminal 1a<SP>1</SP> is the input for the second amplifier giving an output on terminal 1b<SP>1</SP>. The Specification describes other arrangements using two or more amplifier stages, each stage being based on Fig. 1.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET17243A DE1108278B (en) | 1959-09-19 | 1959-09-19 | Parametric amplifier arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
GB911334A true GB911334A (en) | 1962-11-28 |
Family
ID=7548526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3193560A Expired GB911334A (en) | 1959-09-19 | 1960-09-16 | Improvements in or relating to parametric amplifier arrangements |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1108278B (en) |
GB (1) | GB911334A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3219825A (en) * | 1962-12-18 | 1965-11-23 | Richard H Graham | Solid state radiation detection system with low noise amplification |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE302318B (en) * | 1965-03-31 | 1968-07-15 | Ericsson Telefon Ab L M |
-
1959
- 1959-09-19 DE DET17243A patent/DE1108278B/en active Pending
-
1960
- 1960-09-16 GB GB3193560A patent/GB911334A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3219825A (en) * | 1962-12-18 | 1965-11-23 | Richard H Graham | Solid state radiation detection system with low noise amplification |
Also Published As
Publication number | Publication date |
---|---|
DE1108278B (en) | 1961-06-08 |
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