公开(公告)号：US06906581B2

公开(公告)日：2005-06-14

申请号：US10424902

申请日：2003-04-29

Applicant: Tzung-Hung Kang ,  Chao-Cheng Lee

Inventor： Tzung-Hung Kang ,  Chao-Cheng Lee

IPC: G05F3/30 ,  G05F1/10

CPC classification number: G05F3/30

Abstract: A fast start-up low-voltage bandgap voltage reference circuit is disclosed. The bandgap voltage reference circuit includes: a first current generator, which is implemented by a self-bias unit and a current mirror for generating a first reference current with positive temperature coefficient; a second current generator, which is connected to a point with negative temperature coefficient in the first current generator to generate a second reference current with negative temperature coefficient; and a resistor for converting the first reference current and the second reference current into a low-voltage bandgap voltage independent of temperature. Because the bandgap voltage reference circuit of the invention uses the resistor to convert the first reference current and the second reference current into voltage, the circuit can provide low-voltage bandgap voltage.

Abstract translation: 公开了一种快速启动低压带隙电压参考电路。 带隙电压基准电路包括：第一电流发生器，其由自偏压单元和电流镜实现，用于产生具有正温度系数的第一参考电流; 第二电流发生器，其连接到第一电流发生器中具有负温度系数的点，以产生具有负温度系数的第二参考电流; 以及用于将第一参考电流和第二参考电流转换成与温度无关的低电压带隙电压的电阻器。 由于本发明的带隙电压基准电路使用电阻器将第一参考电流和第二参考电流转换为电压，所以该电路可以提供低电压带隙电压。

公开(公告)号：US20110063153A1

公开(公告)日：2011-03-17

申请号：US12948775

申请日：2010-11-18

Applicant: Tzung-Hung Kang

Inventor： Tzung-Hung Kang

IPC: H03M1/00 ,  H03M1/12

CPC classification number: H03M1/367 ,  H03M1/1295 ,  H03M1/183 ,  H03M1/362

Abstract: A data readout system with non-uniform resolution has a pick up head for reading data stored in an optical disc and generating an analog signal, a reference voltage unit for producing a plurality of reference voltage levels, wherein voltage differences between two adjacent reference voltage levels are not all the same, a plurality of comparators for comparing the reference voltage levels with the analog signal and generating comparison results, and an encoder for encoding the comparison results into a digital signal.

Abstract translation: 具有不均匀分辨率的数据读出系统具有用于读取存储在光盘中的数据并产生模拟信号的拾取头，用于产生多个参考电压电平的参考电压单元，其中两个相邻参考电压电平之间的电压差 多个比较器，用于将参考电压电平与模拟信号进行比较并产生比较结果;以及编码器，用于将比较结果编码为数字信号。

公开(公告)号：US07768432B2

公开(公告)日：2010-08-03

申请号：US12371938

申请日：2009-02-17

Applicant: Wei-Hsuan Tu ,  Tzung-Hung Kang

Inventor： Wei-Hsuan Tu ,  Tzung-Hung Kang

IPC: H03M1/06

CPC classification number: H03M1/1215 ,  H03M1/168 ,  H03M1/36

Abstract: An analog-to-digital (A/D) conversion device is provided and includes a first A/D conversion stage. The A/D conversion stage includes a first pre-amp unit, first and second latch units, and a first conversion unit. The first pre-amp unit amplifies the analog input data and outputs a first amplified data. The first and second latch units are enabled by first and second latch clock signals to latch the first and second amplified data and generate first and second latched data, respectively. The first pre-amp unit is reset between a time point when the first latch unit is enabled and a time point when the second latch unit is enabled. The first conversion unit receives the analog input data, and the first and second latched data and accordingly generates a first analog output data.

Abstract translation: 提供了模数（A / D）转换装置并包括第一A / D转换级。 A / D转换级包括第一前置放大器单元，第一和第二锁存单元以及第一转换单元。 第一个前置放大器单元放大模拟输入数据并输出第一个放大数据。 第一和第二锁存单元由第一和第二锁存时钟信号使能，以锁存第一和第二放大数据并分别产生第一和第二锁存数据。 第一预放大单元在第一锁存单元被使能的时间点和第二锁存单元被使能的时间点之间复位。 第一转换单元接收模拟输入数据以及第一和第二锁存数据，从而产生第一模拟输出数据。

公开(公告)号：US07746260B1

公开(公告)日：2010-06-29

申请号：US12339084

申请日：2008-12-19

Applicant: Wei-Hsuan Tu ,  Tzung-Hung Kang

Inventor： Wei-Hsuan Tu ,  Tzung-Hung Kang

IPC: H03M1/66

CPC classification number: H03M1/66

Abstract: A multiplying digital-to-analog converter includes an operational amplifier (OP-amp) operated under a first power supply voltage and a second power supply voltage; an OP-amp input switch block coupled to a common mode voltage for selectively coupling the common mode voltage to input nodes of the OP-amp, wherein all switches included in the OP-amp input switch block are implemented utilizing PMOS transistors only, and the common mode voltage is substantially equal to the first power supply voltage; a capacitor block coupled to the OP-amp input switch block; a sampling switch block coupled to the input signal for selectively coupling the input signal to the capacitor block; a reference voltage switch block coupled to the capacitor block for selectively coupling the reference signal to the capacitor block; and a feedback switch block coupled between the capacitor block and output nodes of the OP-amp.

Abstract translation: 倍增的数/模转换器包括在第一电源电压和第二电源电压下操作的运算放大器（OP-amp）; 耦合到共模电压的OP-amp输入开关块，用于选择性地将共模电压耦合到OP放大器的输入节点，其中包括在OP-amp输入开关块中的所有开关仅利用PMOS晶体管来实现，并且 共模电压基本上等于第一电源电压; 耦合到OP-amp输入开关块的电容器块; 耦合到所述输入信号的选择开关块，用于选择性地将所述输入信号耦合到所述电容器块; 耦合到电容器块的参考电压开关块，用于选择性地将参考信号耦合到电容器块; 以及耦合在电容器块和OP-amp的输出节点之间的反馈开关块。

公开(公告)号：US06970026B2

公开(公告)日：2005-11-29

申请号：US10761260

申请日：2004-01-22

Applicant: Tzung-Hung Kang

Inventor： Tzung-Hung Kang

IPC: H03K17/22 ,  H03K5/153

CPC classification number: H03K17/223

Abstract: A power-on reset circuit and method for generating a reset signal according to the voltage of a power source. The circuit includes an oscillator for generating an oscillation signal. The frequency of the oscillation signal increases with the rising of the voltage of the power source. The circuit further includes a frequency detector for converting the oscillation frequency of the oscillation signal into a first output voltage, and includes a reset signal output circuit for outputting a reset signal according to the first output voltage. Therefore, the power-on reset circuit can be applied in low-voltage chips.

Abstract translation: 一种上电复位电路和根据电源的电压产生复位信号的方法。 电路包括用于产生振荡信号的振荡器。 振荡信号的频率随着电源电压的上升而增加。 该电路还包括用于将振荡信号的振荡频率转换为第一输出电压的频率检测器，并且包括用于根据第一输出电压输出复位信号的复位信号输出电路。 因此，上电复位电路可以应用于低电压芯片。