Title:
LOW-PASS MATCHING-TYPE NUMERICAL CONTROL ATTENUATOR CIRCUIT WITH LARGE DYNAMIC CONSTANT PHASE
Document Type and Number:
WIPO Patent Application WO/2020/114127
Kind Code:
A1
Abstract:
Disclosed is a low-pass matching-type numerical control attenuator circuit with a large dynamic constant phase. The circuit comprises: an input node and an output node, wherein a reference path and an attenuation path are connected between the input node and the output node; and the input node receives a signal to be attenuated, and the output node outputs an attenuated signal. The beneficial effects of the present invention are: (1) using a circuit architecture which is switched between a reference path and an attenuation path can achieve a constant phase characteristic while a high dynamic attenuation range is satisfied; (2) an asymmetrical switch structure being connected to a reactive element in series to constitute a low-pass matching structure can achieve large dynamic, high precision, low insertion loss and low additional phase shift characteristics in a relatively wide frequency range; and (3) using an improved T-type or π-type resistor network can further improve attenuation accuracy.
Inventors:
GAI CHUAN (CN)
LI YAO (CN)
XIA DONG (CN)
LI YAO (CN)
XIA DONG (CN)
Application Number:
PCT/CN2019/112619
Publication Date:
June 11, 2020
Filing Date:
October 22, 2019
Export Citation:
Assignee:
NANJING MILEWEI CORP (CN)
International Classes:
H03H11/24
Foreign References:
| CN109546989A | 2019-03-29 | |||
| CN209375595U | 2019-09-10 | |||
| CN1968013A | 2007-05-23 | |||
| CN104852706A | 2015-08-19 | |||
| CN106411288A | 2017-02-15 | |||
| CN101902213A | 2010-12-01 |
Attorney, Agent or Firm:
NANJING TAIPU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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