公开(公告)号：GB2336961B

公开(公告)日：2003-04-16

申请号：GB9905801

申请日：1999-03-12

Applicant: INT RECTIFIER CORP

Inventor： TAKAHASHI TOSHIO ,  TAM DAVID ,  CHEY CHRISTOPHER ,  DUBHASHI AJIT ,  PARRY JOHN ,  TCHAMDSOU ARISTIDE

IPC: G01R19/25 ,  H02P20060101 ,  H02P7/00 ,  H02P23/00 ,  H03F3/387 ,  H03K7/08 ,  H03M1/60

公开(公告)号：IT1313747B1

公开(公告)日：2002-09-17

申请号：ITMI990524

申请日：1999-03-12

Applicant: INT RECTIFIER CORP

Inventor： TAKAHASHI TOSHIO ,  TAM DAVID C ,  CHEY CHRISTOPHER C ,  DUBHASHI AJIT ,  PARRY JOHN ,  TCHAMDSOU ARISTIDE

IPC: G01R19/25 ,  H02P20060101 ,  H02P7/00 ,  H02P23/00 ,  H03F3/387 ,  H03K7/08 ,  H03M1/60

公开(公告)号：ITMI990524A1

公开(公告)日：2000-09-12

申请号：ITMI990524

申请日：1999-03-12

Applicant: INT RECTIFIER CORP

Inventor： TAKAHASHI TOSHIO ,  TAM DAVID C ,  CHEY CHRISTOPHER C ,  DUBHASHI AJIT ,  PARRY JOHN ,  TCHAMDSOU ARISTIDE

IPC: G01R19/25 ,  H02P20060101 ,  H02P7/00 ,  H02P23/00 ,  H03F3/387 ,  H03K7/08 ,  H03M1/60

公开(公告)号：GB2336961A

公开(公告)日：1999-11-03

申请号：GB9905801

申请日：1999-03-12

Applicant: INT RECTIFIER CORP

Inventor： TAKAHASHI TOSHIO ,  TAM DAVID ,  CHEY CHRISTOPHER ,  DUBHASHI AJIT ,  PARRY JOHN ,  TCHAMDSOU ARISTIDE

IPC: G01R19/25 ,  H02P20060101 ,  H02P7/00 ,  H02P23/00 ,  H03F3/387 ,  H03K7/08 ,  H03M1/60

Abstract: A circuit for recovering a signal of interest which is offset by a common mode displacement, such as is the case when the signal is the voltage across a current sense resistor located on the high side bus or between the switches of a motor controller circuit. The circuit of the present invention converts the voltage across the resistor into a pulse code modulated data, then downshifts the voltage, and then recovers the signal of interest at the lower voltage by demodulating the signal. The recovered signal is then processed, either with a synchronized sample and hold circuit to provide an analog output, or with a counter and latch to provide a digital output.

公开(公告)号：DE19910755B4

公开(公告)日：2007-04-26

申请号：DE19910755

申请日：1999-03-11

Applicant: INT RECTIFIER CORP

Inventor： TAKAHASHI TOSHIO ,  TAM DAVID C ,  PARRY JOHN ,  TCHAMDSOU ARISTIDE ,  CHEY CHRISTOPHER C ,  DUBHASHI AJIT

IPC: H03K7/08 ,  G01R19/25 ,  H02P20060101 ,  H02P7/00 ,  H02P23/00 ,  H03F3/387 ,  H03M1/60

公开(公告)号：DE19910755A1

公开(公告)日：1999-10-28

申请号：DE19910755

申请日：1999-03-11

Applicant: INT RECTIFIER CORP

Inventor： TAKAHASHI TOSHIO ,  TAM DAVID C ,  PARRY JOHN ,  TCHAMDSOU ARISTIDE ,  CHEY CHRISTOPHER C ,  DUBHASHI AJIT

IPC: G01R19/25 ,  H02P20060101 ,  H02P7/00 ,  H02P23/00 ,  H03F3/387 ,  H03K7/08 ,  H03M1/60

Abstract: The circuit converts an analog current sense signal, in a motor drive controller circuit, from a high side reference potential to a low side reference potential for measurement and processing. The circuit comprises a section for converting the input signal, at a first potential, into a pulse width modulated (PWM) signal. A further circuit section is provided for level shifting the pulse width modulated signal from the first potential to a second potential.