公开(公告)号：US06509726B1

公开(公告)日：2003-01-21

申请号：US09918351

申请日：2001-07-30

申请人： Jeongjin Roh

发明人： Jeongjin Roh

IPC分类号： G05F316

CPC分类号： G05F3/30

摘要： A bandgap reference circuit includes at least one transistor, an amplifier and a start-up circuit. The amplifier is coupled to the transistor(s) to establish a bandgap reference voltage. The start-up circuit, in response to the bandgap reference circuit powering up, isolates an output terminal of the amplifier from at least one input terminal of the amplifier and supplies power to the transistor(s) via the output terminal.

摘要翻译： 带隙参考电路包括至少一个晶体管，放大器和启动电路。 放大器耦合到晶体管以建立带隙参考电压。 启动电路响应于带隙参考电路供电，将放大器的输出端与放大器的至少一个输入端隔离，并经由输出端向晶体管供电。

公开(公告)号：US06590512B2

公开(公告)日：2003-07-08

申请号：US09840673

申请日：2001-04-23

申请人： Jeongjin Roh ,  Vijayakumaran V. Nair ,  Jiang Chen ,  Rose W. Wang

发明人： Jeongjin Roh ,  Vijayakumaran V. Nair ,  Jiang Chen ,  Rose W. Wang

IPC分类号： H03M300

CPC分类号： H03M3/496

摘要： An analog to digital converter may achieve an output sampling rate that is not an integer multiple of the system clock. This may be done without using the conventional phase-locked loop circuit that generally requires a longer design time, more testing, and more silicon area. A pseudo clock may be generated from the system clock in which some of the system clock pulses are disabled to achieve a pseudo clock with the desired effective frequency.

公开(公告)号：US06462612B1

公开(公告)日：2002-10-08

申请号：US09894151

申请日：2001-06-28

申请人： Jeongjin Roh ,  Vijayakumaran V. Nair

发明人： Jeongjin Roh ,  Vijayakumaran V. Nair

IPC分类号： G05F100

CPC分类号： G05F3/30

摘要： A bandgap reference circuit utilizes chopper stabilization to reduce reference voltage variation caused by, for example, offset voltage and 1/f noise within an associated amplifier. The input signal of the amplifier is modulated using a high frequency modulation signal. The modulated signal is then amplified and demodulated. In one embodiment, a single-ended chopper amplifier having integrated amplification/demodulation functionality is provided.

摘要翻译： 带隙参考电路利用斩波器稳定来减少由相关放大器内的偏移电压和1 / f噪声引起的参考电压变化。 使用高频调制信号调制放大器的输入信号。 然后对调制信号进行放大和解调。 在一个实施例中，提供具有集成的放大/解调功能的单端斩波放大器。