Title:
DIFFERENTIAL AMPLIFIER WITH VARIABLE FREQUENCY CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO/2022/186073
Kind Code:
A1
Abstract:
The present invention is provided with a baseband amplifier 100 having an input side differential line and an output side differential line, the baseband amplifier 100 being electrically connected between the two lines, and a peaking amplifier 200 electrically connected between the input side differential line and the output side differential line. The baseband amplifier includes a variable gain differential amplifier 101 able to vary the gain while maintaining a current from a constant current source of a differential circuit constant. An input differential signal is amplified according to a gain frequency characteristic determined by a first frequency characteristic of the baseband amplifier and a second frequency characteristic of the peaking amplifier on the basis of magnitudes and proportions of the gain of the baseband amplifier and the gain of the peaking amplifier, and a frequency characteristic of an output differential signal obtained by the input differential signal being multiplexed while propagating through the output side differential line can be varied by changing the magnitudes and proportions.
Inventors:
HIRABAYASHI FUMIHITO (JP)
KAWADA YUMI (JP)
KAMIZONO TAKASHI (JP)
KAWADA YUMI (JP)
KAMIZONO TAKASHI (JP)
Application Number:
PCT/JP2022/007901
Publication Date:
September 09, 2022
Filing Date:
February 25, 2022
Export Citation:
Assignee:
ANRITSU CORP (JP)
International Classes:
H03F3/189; H03F3/45
Domestic Patent References:
| WO2014136170A1 | 2014-09-12 | |||
| WO2014181869A1 | 2014-11-13 |
Foreign References:
| JP2010272919A | 2010-12-02 | |||
| US20110228823A1 | 2011-09-22 | |||
| US20190312759A1 | 2019-10-10 |
Attorney, Agent or Firm:
ARIGA, Eiichiro et al. (JP)
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