专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4262157A Decarboxylation process 失效
标题翻译：脱羧过程
公开(公告)号：US4262157A
公开(公告)日：1981-04-14
申请号：US134400
申请日：1980-03-27
申请人： Yuji Hori , Yoshiaki Nagano , Hiroshi Taniguchi
发明人： Yuji Hori , Yoshiaki Nagano , Hiroshi Taniguchi
IPC分类号： C07C1/207 , C07C45/67 , C07C1/20
CPC分类号： C07C1/2078 , C07C45/673
摘要： Decarboxylation of carboxylic acids using diazabicycloalkenes and, if desired, also a simple copper salt, as the means for decarboxylation.
摘要翻译：作为脱羧的手段，使用二氮杂二环烯烃和如果需要也是简单的铜盐使羧酸脱羧。

2. 发明授权

US5408199A Gain control amplifier having reduced feedback resistance 失效
标题翻译：增益控制放大器具有降低的反馈电阻
公开(公告)号：US5408199A
公开(公告)日：1995-04-18
申请号：US223030
申请日：1994-04-05
申请人： Yoshiaki Nagano , Fumihide Murao
发明人： Yoshiaki Nagano , Fumihide Murao
IPC分类号： H03F1/34 , H03G3/00 , H03G3/12 , H03G3/20
CPC分类号： H03G3/001
摘要： There is disclosed a gain control amplifier wherein a signal input terminal (1) receiving an input signal (V.sub.in) is connected to a variable resistor portion (71) including an R-2R ladder resistor group and switches (K.sub.1 to K.sub.4), and an operational amplifier (10) and resistors (r.sub.1, r.sub.2, r.sub.3) construct an adding circuit (91), which outputs an output signal (V.sub.out) to a signal output terminal (5). Each of the switches (K.sub.1 to K.sub.4) includes terminals (A, B) and a common terminal (C) connected to one of the terminals (A, B). All of the terminals (A) arc connected to the signal input terminal (1) in common, and all of the terminals (B) are grounded in common. The ladder resistor group (R,2R) need not be of great resistance value. Thus, a gain control amplifier is achieved which is permitted to control a gain widely, finely and linearly without resistors of great resistance.
摘要翻译：公开了一种增益控制放大器，其中接收输入信号（Vin）的信号输入端（1）连接到包括R-2R梯形电阻器组和开关（K1至K4）的可变电阻器部分（71），并且运算放大器（10）和电阻器（r1，r2，r3）构成加法电路（91），输出信号（Vout）到信号输出端子（5）。每个开关（K1至K4）包括连接到端子（A，B）之一的端子（A，B）和公共端子（C）。所有端子（A）共同连接到信号输入端子（1），所有端子（B）共同接地。梯形电阻组（R，2R）不需要很大的电阻值。因此，实现增益控制放大器，其被允许广泛地，精细地和线性地控制增益，而没有具有很大电阻的电阻器。

3. 发明授权

US5298868A Gain control amplifier 失效
标题翻译：增益控制放大器
公开(公告)号：US5298868A
公开(公告)日：1994-03-29
申请号：US956983
申请日：1992-10-06
申请人： Yoshiaki Nagano
发明人： Yoshiaki Nagano
IPC分类号： H03G3/20 , H03G3/00
CPC分类号： H03G3/001
摘要： A gain control amplifier is disclosed in which its gain changes continuously. Gain control amplifiers are connected in series between a signal input terminal and a signal output terminal. Each gain control amplifier is connected to an up-down counter via a D/A converter. A first up-down counter receives and counts gain control clocks, and increases the gain of a first gain control amplifier through a first D/A converter. When the up-down counter has registered a full count, the gain control clocks are input to a second up-down counter as a second output, during which the full count registered in the up-down counter is maintained as such. Thus, the gain of one gain control amplifier is increased only after the gain of the immediately preceding gain control amplifier has reached its maximum.
摘要翻译：公开了一种增益控制放大器，其中其增益连续变化。增益控制放大器串联连接在信号输入端和信号输出端之间。每个增益控制放大器通过D / A转换器连接到一个升降计数器。第一个递增计数器接收和计数增益控制时钟，并通过第一个D / A转换器增加第一增益控制放大器的增益。当升降计数器已经记录完整计数时，增益控制时钟被输入到作为第二输出的第二升降计数器，在此期间，保持登记在升降计数器中的全部计数。因此，仅在紧接在前的增益控制放大器的增益达到其最大值之后才增加一个增益控制放大器的增益。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式