公开(公告)号：US06978125B2

公开(公告)日：2005-12-20

申请号：US09899339

申请日：2001-07-05

申请人： Bo Lindell ,  Martin Isberg ,  Björn Lindqvist

发明人： Bo Lindell ,  Martin Isberg ,  Björn Lindqvist

IPC分类号： H03J3/08 ,  H04B1/18 ,  H04B1/26 ,  H04B7/00

CPC分类号： H03J3/08

摘要： A tuning arrangement in a radio receiver includes a front-end circuit having a tunable band-pass filter that is capable of tunably selecting channels within at least one frequency band of an RF signal. A noise source coupled to an input of the tunable band-pass filter introduces a wide-band noise signal into the front-end circuit. A signal detector coupled to an output of the front-end circuit measures at least one signal power associated with a filtered noise signal derived from the wide-band noise signal. A tuning controller, coupled to the tunable band-pass filter by a tuning control signal, adjusts the tuning control signal in response to the at least one measured signal power for tuning the tunable band-pass filter to a desired filter response.

摘要翻译： 无线电接收机中的调谐装置包括具有可调谐带通滤波器的前端电路，其能够可调谐地选择RF信号的至少一个频带内的信道。 耦合到可调谐带通滤波器的输入端的噪声源将宽带噪声信号引入前端电路。 耦合到前端电路的输出的信号检测器测量与从宽带噪声信号导出的滤波噪声信号相关联的至少一个信号功率。 通过调谐控制信号耦合到可调谐带通滤波器的调谐控制器响应于至少一个测量信号功率来调整调谐控制信号，以将可调谐带通滤波器调谐到期望的滤波器响应。

公开(公告)号：US06620218B2

公开(公告)日：2003-09-16

申请号：US09767737

申请日：2001-01-24

申请人： Owe Mårs ,  Björn Lindqvist ,  Åsa Ahlin

发明人： Owe Mårs ,  Björn Lindqvist ,  Åsa Ahlin

IPC分类号： B22F100

CPC分类号： B22F1/0059 ,  B22F2998/00 ,  C22C33/02 ,  B22F1/0014

摘要： The invention concerns a method of improving the dynamic properties of compacted and sintered products having a density between 6.8 and 7.6 g/cm3, preferably between 7.0 and 7.4 g/cm3. According to this method an iron based powder, graphite and a solid particular lubricant having a vaporizing temperature less the sintering temperature, preferably less than about 800° C. is compacted and sintered and the maximum particle size of the lubricant is selected so that the largest pores of a compacted and sintered product prepared from the composition are equal to or less than the largest pores obtained in a compacted and sintered product prepared from the composition without lubricant. The invention also concerns composition of an iron based powder, graphite and a solid particular lubricant having a vaporizing temperature less the sintering temperature, preferably less than about 800° C. and a maximum particle size less than about 0.3 of the maximum size of the iron based powder as measured by laser diffraction measurement.

公开(公告)号：US06371117B1

公开(公告)日：2002-04-16

申请号：US09328466

申请日：1999-06-09

申请人： Björn Lindqvist ,  Christian Rossby

发明人： Björn Lindqvist ,  Christian Rossby

IPC分类号： A62B1801

CPC分类号： A62B18/10 ,  A61M16/208

摘要： A directional valve for a breathing apparatus, such as an anaesthetic machine, has a valve seat with a valve port and a valve plate resting loosely on a valve seat. The valve plate has a soft, pliant area on its surface in contact with the valve seat and a relatively rigid area across the valve port.

摘要翻译： 用于诸如麻醉机的呼吸装置的方向阀具有阀座，阀座具有阀口和松动地搁在阀座上的阀板。 阀板在其与阀座接触的表面上具有柔软且柔顺的区域，并且在阀口上方具有相对刚性的区域。