-
公开(公告)号：EP1181773B1
公开(公告)日：2006-08-30
申请号：EP00928051.2
申请日：2000-04-19
发明人： STENSTRÖM, Helge
IPC分类号： H03F3/45
CPC分类号： H03F3/45085 , H03F1/52 , H03F3/45071 , H03F2203/45326
摘要： An amplifier of differential type such as a comparator or operational amplifier has two input terminals (1, 3) which are formed by the base terminals of input, amplifying transistors (T1, T2) of for example npn-type. The collectors of the input transistors are connected to some supply voltage (VCC) through for example a current mirror circuit (T4, T5). The emitters of the input transistors are through a transistor (T3) connected as a current generator connected to another supply voltage (VEE) close to ground potential. The base-emitter-junction in the input transistors are protected by protective transistors (T6, T7) which are connected as diodes, the emitters and bases of which are connected to each other. The effective pn-junction in the protective transistors is then the junction between the base and collector which normally has a larger breakthrough voltage then the pn-junction between the base and emitter. A protection of the input terminals of the amplifier is thereby obtained which can in a simple way be accomplished in for example integrated circuits. Then, the protective transistors are made in substantially the same way as the input transistors and have substantially the same electrical properties as they.
-
公开(公告)号：EP3499712A1
公开(公告)日：2019-06-19
申请号：EP17911398.0
申请日：2017-10-19
发明人： ZHANG, Mengwen
IPC分类号： H03F20060101
CPC分类号： A61B5/7203 , A61B5/02416 , H03F3/005 , H03F3/082 , H03F3/45192 , H03F3/45273 , H03F2203/45156 , H03F2203/45326 , H03F2203/45551
摘要： A signal conversion circuit, a heart rate sensor, and an electronic device are provided, and the signal conversion circuit includes: a photoelectric conversion circuit, configured to convert an optical signal into a current signal, where the current signal in a first phase includes a signal converted from a useful optical signal, a modulated optical signal and a background optical signal in the optical signal, and the current signal in a second phase includes a signal converted from the background optical signal; a differential signal conversion circuit, connected to the photoelectric conversion circuit, and configured to convert the current signal into a first differential signal and a second differential signal, where the first differential signal is an integration signal of the current signal in the first phase, and the second differential signal is an integration signal of the current signal in the second phase; and a subtraction amplifier, connected to the differential signal conversion circuit, and configured to amplify a difference value between the first differential signal and the second differential signal, to generate a third differential signal. The signal conversion circuit of embodiments of the present invention can effectively suppress ambient interference.
-
公开(公告)号：EP2156560A1
公开(公告)日：2010-02-24
申请号：EP08735909.7
申请日：2008-04-07
IPC分类号： H03L7/089
CPC分类号： H03L7/0896 , H02M3/07 , H03F2203/45028 , H03F2203/45326
摘要： A charge pump CMOS circuit comprises a differential input stage with two parallel circuit branches. Each of the parallel circuit branches has a diode-connected MOS transistor connected in series with a complementary input MOS transistor. There is a common tail current source for both circuit branches. The diode-connected MOS transistors each have their gate/drain node connected to corresponding current sources. The charge pump CMOS circuit is suitable for use in an oscillator.
-
公开(公告)号：EP1168640A3
公开(公告)日：2006-10-18
申请号：EP01113571.2
申请日：2001-06-13
发明人： Claxton, Shimen K. , Oyama, Bert K. , Kintis, Mark , Smith, Andrew D. , Talbott, Craig R. , Martin, Donald R. , Skones, William M. , Smith Ronald P. , Moretti, Vincent C.
IPC分类号： H04B1/28
CPC分类号： H03F3/45085 , H03D7/163 , H03F3/1935 , H03F2200/198 , H03F2200/294 , H03F2200/331 , H03F2200/372 , H03F2203/45326 , H04B1/0003 , H04B1/0007 , H04B1/0028 , H04B1/0032 , H04B1/28 , H04L5/06
摘要： A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band. In an alternate embodiment, the frequency down-conversion is performed in a double down-conversion process so that a less complex ADC (62) can be used.
-
公开(公告)号：EP1181773A1
公开(公告)日：2002-02-27
申请号：EP00928051.2
申请日：2000-04-19
发明人： STENSTRÖM, Helge
IPC分类号： H03F3/45
CPC分类号： H03F3/45085 , H03F1/52 , H03F3/45071 , H03F2203/45326
摘要： An amplifier of differential type such as a comparator or operational amplifier has two input terminals (1, 3) which are formed by the base terminals of input, amplifying transistors (T1, T2) of for example npn-type. The collectors of the input transistors are connected to some supply voltage (VCC) through for example a current mirror circuit (T4, T5). The emitters of the input transistors are through a transistor (T3) connected as a current generator connected to another supply voltage (VEE) close to ground potential. The base-emitter-junction in the input transistors are protected by protective transistors (T6, T7) which are connected as diodes, the emitters and bases of which are connected to each other. The effective pn-junction in the protective transistors is then the junction between the base and collector which normally has a larger breakthrough voltage then the pn-junction between the base and emitter. A protection of the input terminals of the amplifier is thereby obtained which can in a simple way be accomplished in for example integrated circuits. Then, the protective transistors are made in substantially the same way as the input transistors and have substantially the same electrical properties as they.
-
公开(公告)号：EP2156560B1
公开(公告)日：2018-05-23
申请号：EP08735909.7
申请日：2008-04-07
CPC分类号： H03L7/0896 , H02M3/07 , H03F2203/45028 , H03F2203/45326
摘要： A charge pump CMOS circuit comprises a differential input stage with two parallel circuit branches. Each of the parallel circuit branches has a diode-connected MOS transistor connected in series with a complementary input MOS transistor. There is a common tail current source for both circuit branches. The diode-connected MOS transistors each have their gate/drain node connected to corresponding current sources. The charge pump CMOS circuit is suitable for use in an oscillator.
-
公开(公告)号：EP1168640B1
公开(公告)日：2009-06-03
申请号：EP01113571.2
申请日：2001-06-13
发明人： Claxton, Shimen K. , Oyama, Bert K. , Kintis, Mark , Smith, Andrew D. , Talbott, Craig R. , Martin, Donald R. , Skones, William M. , Smith Ronald P. , Moretti, Vincent C.
IPC分类号： H04B1/28
CPC分类号： H03F3/45085 , H03D7/163 , H03F3/1935 , H03F2200/198 , H03F2200/294 , H03F2200/331 , H03F2200/372 , H03F2203/45326 , H04B1/0003 , H04B1/0007 , H04B1/0028 , H04B1/0032 , H04B1/28 , H04L5/06
-
公开(公告)号：EP1168640A2
公开(公告)日：2002-01-02
申请号：EP01113571.2
申请日：2001-06-13
申请人： TRW Inc.
发明人： Claxton, Shimen K. , Oyama, Bert K. , Kintis, Mark , Smith, Andrew D. , Talbott, Craig R. , Martin, Donald R. , Skones, William M. , Smith Ronald P. , Moretti, Vincent C.
CPC分类号： H03F3/45085 , H03D7/163 , H03F3/1935 , H03F2200/198 , H03F2200/294 , H03F2200/331 , H03F2200/372 , H03F2203/45326 , H04B1/0003 , H04B1/0007 , H04B1/0028 , H04B1/0032 , H04B1/28 , H04L5/06
摘要： A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band. In an alternate embodiment, the frequency down-conversion is performed in a double down-conversion process so that a less complex ADC (62) can be used.
摘要翻译： 一种用于无线电信系统的接收机（10），其提供接收信号的相对宽带信号处理，而不增加信号失真，使得可以同时处理多个接收信号。 接收器（10）包括专用LNA（16），降频转换器（18）和ADC（20），以在维持接收器性能的同时执行宽带信号处理。 降频转换器（18）采用合适的混频器（28），BPA（32），衰减器（34）和变压器（36），其被调谐以在期望的宽带上提供期望的频率下变频和幅度控制。 根据ADC的特定性能标准（20）选择下变频器器件。 在接收来自ADC（20）的数字信号的接收机（10）中包括专用数字信道化器（22），并将信号分离成多个信道。 在一个实施例中，在单个下变频过程中执行降频转换，并且ADC（20）采用delta-sigma处理来在整个频带上提供数字转换。 在替代实施例中，在双下变频过程中执行降频转换，使得可以使用较不复杂的ADC（62）。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.007 秒)
