公开(公告)号：US06693400B2

公开(公告)日：2004-02-17

申请号：US09978958

申请日：2001-10-16

申请人： Giorgio Pedrazzini ,  Hin Sing Fong ,  Krishnamoorthy Ravishanker

发明人： Giorgio Pedrazzini ,  Hin Sing Fong ,  Krishnamoorthy Ravishanker

IPC分类号： G11B554

CPC分类号： H02P25/034

摘要： A multi-mode motor controller architecture includes a motor, an integrated circuit controller, and an integrated circuit driver circuit. The integrated circuit controller includes a pulse generator, a DAC, an ADC, and a digital compensator circuit. The integrated circuit driver circuit is in communication with the controller and includes an error amplifier, first and second output amplifiers for driving the motor, and a sense amplifier. The motor controller architecture is configurable to operate in a linear mode, a pulsed mode, or a switchable linear/pulsed mode. The controller architecture can be implemented with external compensation circuitry, such as a resistor-capacitor circuit, or with the digital compensation circuitry located within the controller integrated circuit.

摘要翻译： 多模式电动机控制器架构包括电动机，集成电路控制器和集成电路驱动器电路。 集成电路控制器包括脉冲发生器，DAC，ADC和数字补偿电路。 集成电路驱动器电路与控制器通信，并且包括误差放大器，用于驱动电动机的第一和第二输出放大器以及读出放大器。 电机控制器架构可配置为在线性模式，脉冲模式或可切换线性/脉冲模式下工作。 控制器架构可以使用外部补偿电路（如电阻 - 电容电路）或位于控制器集成电路内的数字补偿电路来实现。

公开(公告)号：US06811309B1

公开(公告)日：2004-11-02

申请号：US10088976

申请日：2002-06-27

申请人： Krishnamoorthy Ravishanker

发明人： Krishnamoorthy Ravishanker

IPC分类号： G01K700

CPC分类号： G01K7/01 ,  G05F3/30

摘要： The present invention provides a thermal sensor circuit for sensing the temperature of an integrated circuit chip, the thermal sensor circuit including: an output comparator for comparing a reference voltage, Vref, with a sensed voltage, Vsense, the sensed voltage being measured over a sensing resistor relative to the ground potential of the circuit; a first circuit to which a reference voltage line in connected to measure Vref; a first current mirror providing a first current input to the first circuit and to a compensation circuit; and second current mirror providing a second current input to the compensation circuit and to the sensing resistor. The compensation circuit provides a current gain, defined as the ratio of the second current input to the first current input, for compensating for variations in Vref due to variations of the characteristics of the thermal sensing circuit arising from a manufacturing process of an integrated circuit chip on which the thermal sensor circuit is made by adjusting the second current input in dependence on the variations of the characteristics to thereby vary Vsense along with Vref.