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1. 发明申请

WO9940574A3 ARRANGEMENT FOR READING INFORMATION FROM A MAGNETIC RECORD CARRIER 审中-公开
标题翻译：从磁记录载体读取信息的安排
公开(公告)号：WO9940574A3
公开(公告)日：1999-11-04
申请号：PCT/IB9900110
申请日：1999-01-25
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS SVENSKA AB
发明人： RAMALHO JOAO N V L , VOORMAN JOHANNES O , LECLERC PATRICK , RAMAEKERS JOZEF A M , LUGTHART MARCEL L , BERGMANS JOHANNES W M
IPC分类号： G01R33/09 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B7/00 , G11B20/10 , G11B20/22 , G11B33/14
CPC分类号： G11B20/10009 , G01R33/09 , G11B5/012 , G11B5/02 , G11B5/09 , G11B7/00 , G11B20/22 , G11B33/14 , G11B2005/0016 , G11B2005/0018
摘要： An arrangement is disclosed for reading information from a record carrier. The arrangement comprises a read head having at least one magneto-resistive element (Rmr), a first transistor (Tr1) and a second transistor (Tr2). The base of the first transistor (Tr1) is coupled to the emitter of the second transistor (Tr2) via a first capacitor (6). The base of the second transistor (Tr2) is coupled to the emitter of the first transistor (Tr1) via a second capacitor (8). The arrangement further comprises a non-linear transconductance amplifier (14) having first and second inputs coupled to the output terminals (10, 12) of the arrangement, and having and inverting and non-inverting outputs coupled to the bases of the first and second transistor. The non-linear transconductance amplifier (14) is adapted to supply a control current at its inverting and non-inverting outputs in response to a voltage present across its inputs, such that for first and second input voltages resulting in first and second output currents, respectively, the first input voltage being larger than the second input voltage, the amplification factor of the transconductance means being larger for generating the first output current than for generating the second output current.
摘要翻译：公开了用于从记录载体读取信息的安排。该装置包括具有至少一个磁阻元件（Rmr），第一晶体管（Tr1）和第二晶体管（Tr2）的读取头。第一晶体管（Tr1）的基极经由第一电容器（6）耦合到第二晶体管（Tr2）的发射极。第二晶体管（Tr2）的基极经由第二电容器（8）耦合到第一晶体管（Tr1）的发射极。该装置进一步包括非线性跨导放大器（14），其具有耦合到该装置的输出端子（10,12）的第一和第二输入端，并具有耦合到第一和第二基极的反相和非反相输出晶体管。非线性跨导放大器（14）适于响应于其输入端上存在的电压在其反相和非反相输出端处提供控制电流，使得对于产生第一和第二输出电流的第一和第二输入电压，所述第一输入电压大于所述第二输入电压，所述跨导装置的放大因子对于产生所述第一输出电流而言大于对于产生所述第二输出电流。

2. 发明专利

JP2003032053A Low input impedance amplifier 有权
标题翻译：低输入阻抗放大器
公开(公告)号：JP2003032053A
公开(公告)日：2003-01-31
申请号：JP2002164607
申请日：2002-06-05
申请人： Koninkl Philips Electronics Nv , コーニンクレッカフィリップスエレクトロニクスエヌヴィ
发明人： BRAZ FABIO , LECLERC PATRICK , GUIRAUD LIONEL
IPC分类号： H03F1/56 , H03F1/22 , H03F3/343
CPC分类号： H03F3/343
摘要： PROBLEM TO BE SOLVED: To provide an amplifier that amplifies a current signal coming from any of signal inputs Ini (i=1 to N) before the signal is available at output terminals OUTi (i=1 to P).
SOLUTION: An amplifier CD is provided with a 1st transistor(TR) T1 and a 2nd TR T2 connected in series between a power terminal VCC and a ground terminal. The transfer terminal of the 1st TR T1 is connected to the bias terminal of the 2nd TR T2 to form an input to the amplifier CD, and the bias terminal of the 1st TR T1 is connected to a reference potential terminal. The amplifier CD has a low input impedance and a low common-mode output level.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供放大器，其在信号在输出端子OUTi（i = 1至P）处可用之前放大来自信号输入Ini（i = 1至N）中的任一个的电流信号。解决方案：放大器CD设有串联连接在电源端子VCC和接地端子之间的第一晶体管（TR）T1和第二TR T2。第一TR T1的转移端子连接到第二TR T2的偏置端，以形成放大器CD的输入，第一TR T1的偏置端子连接到参考电位端子。放大器CD具有低输入阻抗和低共模输出电平。

3. 发明专利

JP2003209583A SWITCHING DEVICE PROVIDED WITH POLARITY-INVERTING MEANS 审中-公开
公开(公告)号：JP2003209583A
公开(公告)日：2003-07-25
申请号：JP2002304954
申请日：2002-10-18
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： GUIRAUD LIONEL , LECLERC PATRICK
IPC分类号： H03K19/082 , H03F3/45 , H03K17/00 , H03K17/60 , H04L25/02
摘要： PROBLEM TO BE SOLVED: To provide a switching device requiring no reprogramming for a polarity-inverting means. SOLUTION: Two differential pairs T1, T2 and T3, T4 are polarized by a current source 1 and a current source 2 capable of switching starting current flow in the first and the second differential pair as a selected programing function. When the current source 1 is energized and the current source 2 is de- energized, an output signal Vout forms the image of an input signal Vin. Conversely, when the current source 1 is de-energized and the current source 2 is energized, the output signal Vout forms the inverted image of the input signal Vin. COPYRIGHT: (C)2003,JPO

4. 发明专利

JP2000048305A MAGNETIC INFORMATION READER 失效
公开(公告)号：JP2000048305A
公开(公告)日：2000-02-18
申请号：JP20140099
申请日：1999-07-15
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： LECLERC PATRICK , PIERAERTS ERIC , JOAO N VILLA-LOBOS RAMALHO , BARBOTIN JEAN , VOORMAN JOHANNES O
IPC分类号： G11B5/39 , G11B5/00 , G11B5/02 , G11B5/035 , G11B5/09 , G11B5/40
摘要： PROBLEM TO BE SOLVED: To provide a magnetic information reader which does not require the prior measurement of quiescent resistance in order to bias to a magnetic reluctance bar. SOLUTION: This magnetic information reader has at least one read head including at least one magnetic reluctance bar MR with the aim of forming the data pulses indicating the information to be read by the read head. Its application field is the read head for a hard disk. The reader includes a control loop for controlling the electric power to be consumed by the magnetic reluctance bar MR according to the device. The control loop has a time constant larger than the sustained time of the data pulses. The biasing of the magnetic reluctance bar MR without requiring the measurement of the quiescent resistance is made possible.

5. 发明专利

DE69935094T2 未知
公开(公告)号：DE69935094T2
公开(公告)日：2007-11-22
申请号：DE69935094
申请日：1999-07-08
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： LECLERC PATRICK , PIERAERTS ERIC , RAMALHO JOAO , BARBOTIN JEAN , VOORMAN HANS
IPC分类号： G11B5/02 , G11B5/39 , G11B5/00 , G11B5/035 , G11B5/09 , G11B5/40
摘要： Device has a read head with a magneto-resistive head (MR) that generates impulses representative of the data read by the head from the disc. The head has a loop for regulation of the power dissipated in the magneto-resistive bar. The loop has a time constant that is important during the data impulse generation.

6. 发明专利

DE69935094D1 未知
公开(公告)号：DE69935094D1
公开(公告)日：2007-03-29
申请号：DE69935094
申请日：1999-07-08
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： LECLERC PATRICK , PIERAERTS ERIC , RAMALHO JOAO , BARBOTIN JEAN , VOORMAN HANS
IPC分类号： G11B5/02 , G11B5/39 , G11B5/00 , G11B5/035 , G11B5/09 , G11B5/40
摘要： Device has a read head with a magneto-resistive head (MR) that generates impulses representative of the data read by the head from the disc. The head has a loop for regulation of the power dissipated in the magneto-resistive bar. The loop has a time constant that is important during the data impulse generation.

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