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    • 1. 发明授权
    • Level shifter with reduced power consumption and low propagation delay
    • 电平移位器具有降低的功耗和低传播延迟
    • US07847611B2
    • 2010-12-07
    • US12357179
    • 2009-01-21
    • Chih-Wen YangSheng-Hua Chen
    • Chih-Wen YangSheng-Hua Chen
    • H03L5/00
    • H03K19/018521
    • A level shifter includes a Not gate coupled to a signal input and operable between a first high level and a low level; a first PMOS transistor coupled to a second voltage source and a control end; a first NMOS transistor coupled to the first PMOS transistor, a Not-gate output end and a reference voltage; and a control circuit coupled to the signal input, the Not-gate output end and the second voltage source. When the signal input and the Not-gate output end are at the first high level and the low level, respectively, the first PMOS transistor is turned on so that the signal output is at a second high level; and when the signal input and the Not-gate output end are switched contrarily, the first PMOS transistor is turned off and the signal output is at the low level.
    • 电平移位器包括耦合到信号输入并可在第一高电平和低电平之间操作的“否”门; 耦合到第二电压源和控制端的第一PMOS晶体管; 耦合到第一PMOS晶体管的第一NMOS晶体管,非栅极输出端和参考电压; 以及耦合到信号输入,非栅极输出端和第二电压源的控制电路。 当信号输入和非栅极输出端分别处于第一高电平和低电平时,第一PMOS晶体管导通,使得信号输出处于第二高电平; 并且当信号输入和非栅极输出端相反地切换时,第一PMOS晶体管被截止并且信号输出处于低电平。
    • 4. 发明申请
    • Input/output buffer protection circuit
    • 输入/输出缓冲保护电路
    • US20050128670A1
    • 2005-06-16
    • US10735324
    • 2003-12-12
    • Sheng-Hua ChenHung-Yi ChangJeng-Huang Wu
    • Sheng-Hua ChenHung-Yi ChangJeng-Huang Wu
    • H01L27/02H03K19/003H02H3/20
    • H03K19/00315H01L27/0266
    • An input/output buffer protection circuit, which comprises an I/O pad, an I/O buffer, an n-well control circuit, a gate control circuit, and a protection component. The I/O buffer includes a PMOS transistor and a NMOS transistor. The n-well control circuit is coupled to an n-well of the PMOS transistor. When an input voltage higher than a source voltage is applied, voltage at the n-well of the PMOS is increased by the n-well control circuit to the input voltage level. The gate control circuit is coupled to the gate terminal of the PMOS transistor and the input/output pad. When an input voltage higher than a source voltage is applied, voltage at the gate terminal of the PMOS is increased by the gate control circuit to the source voltage level. Wherein the gate control circuit comprises a transistor and the transistor transfers a high potential control voltage to the gate of the PMOS transistor in output mode. The protection component is coupled between the gate of the transistor and the I/O pad to generate a voltage drop down path and block the I/O pad signal from flowing back to the gate of the transistor.
    • 输入/输出缓冲器保护电路,其包括I / O焊盘,I / O缓冲器,n阱控制电路,栅极控制电路和保护部件。 I / O缓冲器包括PMOS晶体管和NMOS晶体管。 n阱控制电路耦合到PMOS晶体管的n阱。 当施加高于源电压的输入电压时,PMOS的n阱处的电压由n阱控制电路增加到输入电压电平。 栅极控制电路耦合到PMOS晶体管的栅极端子和输入/输出焊盘。 当施加高于源极电压的输入电压时,PMOS栅极端子处的电压由栅极控制电路增加到源极电压电平。 其中栅极控制电路包括晶体管,并且晶体管在输出模式下将高电位控制电压传送到PMOS晶体管的栅极。 保护元件耦合在晶体管的栅极和I / O焊盘之间,以产生电压降降路径,并阻止I / O焊盘信号流回晶体管的栅极。
    • 7. 发明授权
    • Crystal oscillator circuit with activation control
    • 晶振电路具有启动控制功能
    • US07057468B2
    • 2006-06-06
    • US10876083
    • 2004-06-24
    • Jeng-Huang WuSheng-Hua Chen
    • Jeng-Huang WuSheng-Hua Chen
    • H03B1/00H03L5/00G06F1/04
    • H03K3/0307
    • A CMOS Pierce crystal oscillator. A clock generator with activation control, for generating a clock signal. The clock generator comprises an amplifier, a shaping circuit and a diagnostic circuit. The amplifier is capable of being coupled to an external oscillation source through an input pad and an output pad to generate an oscillating signal, the shaping circuit is capable of being coupled to the output pad, for shaping the oscillating signal to generate a clock signal, and the diagnostic circuit is capable of being coupled to the output pad, for asserting a ready signal when amplitude of the oscillating signal exceeds a predetermined portion of a full swing voltage.
    • CMOS皮尔斯晶体振荡器。 具有启动控制的时钟发生器,用于产生时钟信号。 时钟发生器包括放大器,整形电路和诊断电路。 放大器能够通过输入焊盘和输出焊盘耦合到外部振荡源以产生振荡信号,整形电路能够耦合到输出焊盘,用于整形振荡信号以产生时钟信号, 并且诊断电路能够耦合到输出焊盘,用于当振荡信号的振幅超过全摆幅电压的预定部分时断言就绪信号。
    • 8. 发明授权
    • Input/output buffer
    • 输入/输出缓冲器
    • US06882188B1
    • 2005-04-19
    • US10673391
    • 2003-09-30
    • Sheng-Hua ChenHung-Yi ChangJeng-Huang Wu
    • Sheng-Hua ChenHung-Yi ChangJeng-Huang Wu
    • H03K19/003H03B1/00
    • H03K19/00315
    • An input/output buffer. An input/output circuit has a transmission terminal coupled to an I/O pad, and a floating N-well region. A P-gate control circuit conveys the second gate control signal to the gate of the first PMOS transistor. A feedback detection device is coupled between the transmission terminal and an N-well control circuit to output a feedback signal according to an input voltage at the I/O pad. The N-well control circuit adjusts the voltage level at the N-well region of the first PMOS transistor according to the feedback signal output from the feedback detection device.
    • 一个输入/输出缓冲区。 输入/输出电路具有耦合到I / O焊盘和浮动N阱区的传输端。 P栅极控制电路将第二栅极控制信号传送到第一PMOS晶体管的栅极。 反馈检测装置耦合在传输终端和N阱控制电路之间,以根据I / O焊盘的输入电压输出反馈信号。 N阱控制电路根据从反馈检测装置输出的反馈信号,调整第一PMOS晶体管的N阱区域的电压电平。
    • 9. 发明授权
    • Input/output buffer
    • 输入/输出缓冲器
    • US06861874B1
    • 2005-03-01
    • US10679399
    • 2003-10-07
    • Sheng-Hua ChenHung-Yi ChangJeng-Huang Wu
    • Sheng-Hua ChenHung-Yi ChangJeng-Huang Wu
    • H03K19/003H03K19/0175
    • H03K19/00315
    • An input/output buffer. An input/output circuit is composed of a first PMOS transistor and a first NMOS transistor, has an I/O port coupled to an I/O pad, and a N-well region. An N-well control circuit controls the voltage level at the N-well region of the first PMOS transistor according to input signals at the I/O pad. A P-gate control circuit receives a second gate control signal and outputs to the gate of the first PMOS transistor. The P-gate control circuit is composed of a transmission gate and a third PMOS transistor. The transmission gate and the third PMOS transistor do not have to follow the design rule for ESD, and the wafer area required for the P-gate control circuit can be decreased because the P-gate control circuit is not directly connected to the I/O pad.
    • 一个输入/输出缓冲区。 输入/输出电路由第一PMOS晶体管和第一NMOS晶体管组成,具有耦合到I / O焊盘的I / O端口和N阱区域。 N阱控制电路根据I / O焊盘上的输入信号来控制第一PMOS晶体管的N阱区域的电压电平。 P栅极控制电路接收第二栅极控制信号并输出​​到第一PMOS晶体管的栅极。 P栅极控制电路由传输栅极和第三PMOS晶体管构成。 传输栅极和第三PMOS晶体管不必遵循ESD的设计规则,因为P栅极控制电路不直接连接到I / O,所以P栅极控制电路所需的晶片面积可以减小 垫。