Sony Corporation

Mitsubishi Gas Chemical Company, Inc.

Ryuichiro Kawai

Hidekazu Kikuchi

Takashi Yamamoto

Daisuke Ohno

Isao Matsumoto

Seiichi Nishiyama

Yohei Abiko

Shuya Suenaga

Hiroaki Oka

Kiyoshi Furuya

Masato Kawata

Tomohiro Hariu

Takafumi Takada

An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups.  In Formula (b-1), Qand Qare each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.

Asymmetric membrane

Disclosed herein is a communication centralized control system including one master device; a communication bus; and a plurality of slave devices configured to be connected to the master device by the communication bus, wherein the master device and the plurality of slave devices are capable of bidirectional communication via the communication bus, and different channels are allocated to at least polling communication from the master device to the slave devices and interrupt communication from the slave devices to the master device, and communication is carried out with multiplexing on the same line.

Centralized master-slave-communication control system and method with multi-channel communication on the same line

There is provided a gain control Gilbert amplifier circuit which can be more easily controlled for variation in the gain characteristics of each predriver integrated circuit for primary color image signals R, G, and B, and the variation caused by light emitting efficiency than the prior art. The gain control Gilbert amplifier circuit also operates in a wider frequency range than the conventional circuits, and has a large S/N ratio. One embodiment of the amplifier circuit comprises a grounded-base transistor amplifier circuit having rectifier elements, reference voltage sources, diodes connected to a differentially paired transistors. The rectifier elements are controlled so that a ratio of currents output from constant-current sources can be selected to enable the frequency characteristic of the amplifier circuit to expand by a frequency range.

Wide frequency range amplifier apparatus

A gain control circuit includes first and second clamping circuits each of which has a DC shift circuit and a comparator comprising the output of the DC shift circuit with a reference voltage and providing a feedback signal to the respective shift circuit. A peak detector is responsive to the output of the second clamping circuit and is connected with a comparator which outputs a gain control signal to a variable gain device or amplifier located between the clamp circuits and also to the comparators associated with the DC shift circuits for varying the follow-up speeds of the clamping circuits.

Gain control circuit

Growing community of inventors

Tokyo, Japan

Ryuichiro Kawai