Title:
FOLDING CIRCUIT AND ANALOG-TO-DIGITAL CONVERTER
Document Type and Number:
WIPO Patent Application WO/2008/029778
Kind Code:
A1
Abstract:
A folding circuit and an analog-to-digital converter wherein the response to small
signals is improved, the load on clock signals can be reduced and the increase of
circuit area can be prevented. There are included a reference voltage generating circuit
that generates a plurality of different voltages as reference voltages; and
a plurality of amplifying circuits that convert difference voltages between the
plurality of reference voltages and an analog input voltage to difference currents
and output these difference currents. The output terminals of the amplifying circuits
are alternately connected. Each of the amplifying circuits comprises a differential
amplifier circuit having cascode output transistors (145,146). A switch (144),
which is turned on in synchronism with a control clock, is connected between the
sources of the cascode output transistors (145,146).
Inventors:
OHKAWA, Takeshi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
大川 剛史 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
ONO, Koichi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
尾野 孝一 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
MATSUURA, Kouji (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
松浦 浩二 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
YAMASITA, Yukitosi (3-2 Momochihama 2-chome, Sawara-ku, Fukuoka-sh, Fukuoka 01, 8140001, JP)
大川 剛史 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
ONO, Koichi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
尾野 孝一 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
MATSUURA, Kouji (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
松浦 浩二 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
YAMASITA, Yukitosi (3-2 Momochihama 2-chome, Sawara-ku, Fukuoka-sh, Fukuoka 01, 8140001, JP)
Application Number:
JP2007/067161
Publication Date:
March 13, 2008
Filing Date:
September 04, 2007
Export Citation:
Assignee:
SONY CORPORATION (7-1 Konan 1-chome, Minato-ku Tokyo, 75, 1080075, JP)
ソニー株式会社 (〒75 東京都港区港南１丁目７番１号 Tokyo, 1080075, JP)
OHKAWA, Takeshi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
大川 剛史 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
ONO, Koichi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
尾野 孝一 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
MATSUURA, Kouji (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
松浦 浩二 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
ソニー株式会社 (〒75 東京都港区港南１丁目７番１号 Tokyo, 1080075, JP)
OHKAWA, Takeshi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
大川 剛史 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
ONO, Koichi (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
尾野 孝一 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
MATSUURA, Kouji (7-1 Konan 1-chome, Minato-k, Tokyo 75, 1080075, JP)
松浦 浩二 (〒75 東京都港区港南１丁目７番１号 ソニー株式会社内 Tokyo, 1080075, JP)
International Classes:
H03M1/36; H03M1/14
Attorney, Agent or Firm:
SATOH, Takahisa (Sohshin International Patent Office, 4-2 Yanagibashi 2-chome, Taito-k, Tokyo 52, 1110052, JP)
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