JPS57143915A - Infinite phase shifter - Google Patents
Infinite phase shifterInfo
- Publication number
- JPS57143915A JPS57143915A JP2838181A JP2838181A JPS57143915A JP S57143915 A JPS57143915 A JP S57143915A JP 2838181 A JP2838181 A JP 2838181A JP 2838181 A JP2838181 A JP 2838181A JP S57143915 A JPS57143915 A JP S57143915A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- fets
- amplitude
- elements
- branched
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/16—Networks for phase shifting
- H03H11/20—Two-port phase shifters providing an adjustable phase shift
Landscapes
- Networks Using Active Elements (AREA)
Abstract
PURPOSE:To improve insertion loss, to reduce an amplitude and a phase error, and to improve precision by adjusting the amplitude of a signal, branched into four sequences by gain adjustment under the drain current control of an FET, and synthesizing them. CONSTITUTION:After an input signal is branched into two, one component is shifted in phase by pi/2 through a pi/2 phase shifter 8, amplitude adjustment and polarity inversion are performed by balanced modulators consisting of elements 7-14, and 7'-14', and the resulting components are synthesized at a part 15 with a 90 deg. phase difference. Through the operation of the balanced modulator consisting of the elements 7-14, an input signal to the branching circuit 7 is branched into two, and one component is shifted in phase by pi; and two resulting 180 deg. out-of-phase branched signals are amplified, amplitude-adjusted, and weighted by FETs 10 and 11 to be synthesized at part 14. The gain adjustment of the FETs 10 and 11 is carried out by limiting the drain currents of the FETs 10 and 11 by varying the gate biases of FETs 12 and 13. The other balanced modulator consisting of the elements 7'-14' has the same constitution with the former modulator consisting of the elements 7-14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2838181A JPS57143915A (en) | 1981-03-02 | 1981-03-02 | Infinite phase shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2838181A JPS57143915A (en) | 1981-03-02 | 1981-03-02 | Infinite phase shifter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57143915A true JPS57143915A (en) | 1982-09-06 |
Family
ID=12247060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2838181A Pending JPS57143915A (en) | 1981-03-02 | 1981-03-02 | Infinite phase shifter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143915A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478012A (en) * | 1987-09-19 | 1989-03-23 | Fujitsu Ltd | Phase shifting circuit |
| EP0308844A2 (en) * | 1987-09-19 | 1989-03-29 | Fujitsu Limited | Phase shift circuit |
| JP2001156551A (en) * | 1999-11-30 | 2001-06-08 | Fujitsu Ltd | Method for canceling signal and its system |
| CN102232204A (en) * | 2008-12-09 | 2011-11-02 | 日本电信电话株式会社 | Voltage generator, control circuit, vector synthesis type phase shifter and optical transceiver |
-
1981
- 1981-03-02 JP JP2838181A patent/JPS57143915A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478012A (en) * | 1987-09-19 | 1989-03-23 | Fujitsu Ltd | Phase shifting circuit |
| EP0308844A2 (en) * | 1987-09-19 | 1989-03-29 | Fujitsu Limited | Phase shift circuit |
| JPH0572131B2 (en) * | 1987-09-19 | 1993-10-08 | Fujitsu Ltd | |
| JP2001156551A (en) * | 1999-11-30 | 2001-06-08 | Fujitsu Ltd | Method for canceling signal and its system |
| CN102232204A (en) * | 2008-12-09 | 2011-11-02 | 日本电信电话株式会社 | Voltage generator, control circuit, vector synthesis type phase shifter and optical transceiver |
| US8687973B2 (en) | 2008-12-09 | 2014-04-01 | Nippon Telegraph And Telephone Corporation | Voltage generator, control circuit, vector sum phase shifter, and optical transceiver |
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