Title:
ANALOG/DIGITAL CONVERTER
Document Type and Number:
WIPO Patent Application WO/2020/050023
Kind Code:
A1
Abstract:
The present invention converts wideband analog input signals into digital output signals on the basis of a band division method, without needing a filter circuit. An analog processing block Aj (j = an integer of 2–N) down-converts an analog input signal Sx at a cutoff frequency fj–1 for a channel CHj–1 and performs A/D conversion of the obtained analog signal Saj. A digital processing block Bj doubles the signal strength of a first digital signal S1j obtained by Aj, deducts a third digital signal S3j–1 for the channel CHj–1 from an obtained second digital signal S2j, up-converts an obtained third digital signal S3j at the cut-off frequency fj–1, and outputs same as a channel output signal Syj for the channel CHj, to an aggregator 20.
Inventors:
JO TERUO (JP)
YAMAZAKI HIROSHI (JP)
NAGATANI MUNEHIKO (JP)
HAMADA HIROSHI (JP)
NOSAKA HIDEYUKI (JP)
YAMAZAKI HIROSHI (JP)
NAGATANI MUNEHIKO (JP)
HAMADA HIROSHI (JP)
NOSAKA HIDEYUKI (JP)
Application Number:
PCT/JP2019/032569
Publication Date:
March 12, 2020
Filing Date:
August 21, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H03M1/12; H03H17/02; H04J1/05
Domestic Patent References:
| WO2017033446A1 | 2017-03-02 |
Foreign References:
| JP2006504100A | 2006-02-02 | |||
| US20170170838A1 | 2017-06-15 | |||
| JP2017009608A | 2017-01-12 | |||
| US7253761B1 | 2007-08-07 |
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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