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1. 发明申请

US20040164806A1 AMPLIFIER CIRCUIT FOR AM BROADCASTING 失效
标题翻译：用于AM广播的放大器电路
公开(公告)号：US20040164806A1
公开(公告)日：2004-08-26
申请号：US10708339
申请日：2004-02-25
申请人： NIIGATA SEIMITSU CO., LTD.
发明人： Takeshi Ikeda , Hiroshi Miyagi
IPC分类号： H03F003/191
CPC分类号： H03F3/195 , H03F1/223 , H03F1/26 , H03F3/193 , H03F3/1935 , H03F2200/324 , H03F2200/372 , H03F2200/541
摘要： An amplifier circuit for AM broadcasting for amplifying an inputted AM broadcast signal by an FET and outputting it. The amplifier circuit comprises FETs for signal amplification which are P-channel MOSFETs (4, 5) of relatively small flicker noise. While suppressing the flicker noise to a lowest possible level, more circuits including the RF amplifier for AM broadcasting can be integrated on one chip, thereby realizing small size and low noise of the circuits.
摘要翻译：一种用于AM广播的放大器电路，用于通过FET放大输入的AM广播信号并将其输出。放大器电路包括用于信号放大的FET，其是具有相对小的闪烁噪声的P沟道MOSFET（4,5）。在将闪烁噪声抑制到最低水平的同时，包括用于AM广播的RF放大器的更多电路可以集成在一个芯片上，从而实现电路的小尺寸和低噪声。

2. 发明申请

US20030126612A1 Data transmission system, data transmitter, and remote control method 审中-公开
标题翻译：数据传输系统，数据发射机和遥控方式
公开(公告)号：US20030126612A1
公开(公告)日：2003-07-03
申请号：US10366566
申请日：2003-02-14
申请人： Niigata Seimitsu Co., Ltd.
发明人： Takeshi Ikeda , Hiroshi Miyagi
IPC分类号： H04N007/173
CPC分类号： H04N21/433 , H04L12/2801 , H04N5/76 , H04N5/765 , H04N5/782 , H04N7/17318 , H04N7/17327 , H04N21/254 , H04N21/4147 , H04N21/4786
摘要： A two-way CATV system where a center device (1) and a cable modem (8) are connected via a CATV line (7) comprises a hard disc drive (11) for recording TV broadcasting programs transmitted from the center device (1) to the cable modem (8) via the CATV line (7). An e-mail transmitted over the Internet (5) to the center device (1) is transmitted to the cable modem (8) via the CATV line (7). The cable modem (8) analyzes the content of the e-mail to execute the processing specified by this e-mail, so that recording of TV broadcasting programs, download of digital contents, etc. with the CATV can be remotely operated from outside where a user stays with an internet-compatible portable information terminal.
摘要翻译：通过CATV线路（7）连接中心设备（1）和电缆调制解调器（8）的双向有线电视系统包括用于记录从中心设备（1）发送的电视广播节目的硬盘驱动器（11）经由CATV线（7）连接到电缆调制解调器（8）。通过因特网（5）发送到中心设备（1）的电子邮件经由CATV线路（7）发送到电缆调制解调器（8）。电缆调制解调器（8）分析电子邮件的内容以执行由该电子邮件指定的处理，从而可以从外部远程地操作电视广播节目的录制，数字内容的下载等用户保持与互联网兼容的便携式信息终端。

3. 发明申请

US20040066237A1 Amplifier circuit for AM broadcasting 有权
公开(公告)号：US20040066237A1
公开(公告)日：2004-04-08
申请号：US10606964
申请日：2003-06-27
申请人： Niigata Seimitsu Co., Ltd.
发明人： Takeshi Ikeda , Hiroshi Miyagi
IPC分类号： H03F003/68
CPC分类号： H03F3/195 , H03F1/223 , H03F1/26 , H03F3/193 , H03F3/1935 , H03F2200/324 , H03F2200/372 , H03F2200/541
摘要： An amplifier circuit for AM broadcasting for amplifying an inputted AM broadcast signal by an FET and outputting it. The amplifier circuit comprises FETs for signal amplification which are P-channel MOSFETs (4, 5) of relatively small flicker noise. While suppressing the flicker noise to a lowest possible level, more circuits including the RF amplifier for AM broadcasting can be integrated on one chip, thereby realizing small size and low noise of the circuits.

4. 发明申请

US20040160276A1 MULTISTAGED AMPLIFICATION CIRCUIT 失效
标题翻译：多功能放大电路
公开(公告)号：US20040160276A1
公开(公告)日：2004-08-19
申请号：US10605571
申请日：2003-10-09
申请人： NIIGATA SEIMITSU CO., LTD.
发明人： Takeshi Ikeda , Hiroshi Miyagi
IPC分类号： H03F003/45
CPC分类号： H03F3/68 , H03F3/45183 , H03F2203/45051 , H03F2203/45652
摘要： A plurality of transistors Qi (inull1 to n), which are connected to a plurality of differential amplifiers 1, 2, and 3 and which are connected in a multistaged manner and connected to one constant current source 4 by a current mirror, are arranged collectively on an input side of the constant current source 4. Due to this, the wiring length between the constant current source 4 and the transistors Qi is shortened to the utmost, and the stability of circuit can be improved. Also, this can restrict the unfavorableness that noise is superposed on the wiring. Additionally, a voltage drop will not occur due to supplied resistance on the ground line, due to each transistor Qi being grounded to the same place via separate ground lines 6, 7, and 8. Because of this, the current can be supplied from the constant current source 4 to all transistors Qi without breaking the balance of the current mirror.
摘要翻译：连接到多个差分放大器1,2和3并且以多级方式连接并通过电流镜连接到一个恒流源4的多个晶体管Qi（i = 1至n）分别是集中地设置在恒流源4的输入侧。由此，恒定电流源4和晶体管Qi之间的布线长度被最大限度地缩短，可以提高电路的稳定性。此外，这可以限制噪声叠加在布线上的不利因素。另外，由于每个晶体管Qi通过单独的接地线6,7和8接地到相同的位置，所以由于接地线上的电阻而不会发生电压降。因此，可以从恒流源4对所有晶体管齐齐，不破坏电流镜的平衡。

5. 发明申请

US20030169100A1 Filter circuit 失效
标题翻译：滤波电路
公开(公告)号：US20030169100A1
公开(公告)日：2003-09-11
申请号：US10406186
申请日：2003-04-04
申请人： Niigata Seimitsu Co., Ltd.
发明人： Takeshi Ikeda , Hiroshi Miyagi
IPC分类号： H03B001/00 , H04B001/10 , H03K005/00
CPC分类号： H03H11/04 , H03H11/1213
摘要： A filter includes a capacitor (1) connected between the input end IN and the output end OUT of signals and constant current circuits (2, 3) of MOS structure connected between the power source VDD and the ground, and by connecting the output side node of the capacitor (1) and the intermediate node of the constant current circuits (2, 3). Thus, the cut-off frequency of the filter is reduced by adjusting the value of a current passed through the constant current circuits (2, 3), instead of increasing the circuit area required by using a capacitor having a large capacitance value or a resistor having a large resistance value.
摘要翻译：滤波器包括连接在电源VDD和地之间的MOS结构的信号和恒流电路（2,3）的输入端IN和输出端OUT之间的电容器（1），并且通过连接输出侧节点的电容器（1）和恒流电路（2,3）的中间节点。因此，通过调节通过恒流电路（2,3）的电流的值来减小滤波器的截止频率，而不是增加使用具有大电容值的电容器所需的电路面积或电阻具有较大的电阻值。

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