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    • 2. 发明授权
    • Method for generating header and transition flags using DPD technology and optical device using the same
    • 使用DPD技术生成报头和转换标志的方法以及使用其的光学设备
    • US06801484B2
    • 2004-10-05
    • US09949748
    • 2001-09-12
    • Ying-Tzung WangChien-Ming Chen
    • Ying-Tzung WangChien-Ming Chen
    • G11B700
    • G11B27/24G11B7/005G11B7/007G11B7/00718G11B2220/216G11B2220/2575
    • A method for generating header and transition flags using the DPD technology and an optical device using the same are disclosed. The method first sets a first and a second threshold levels. Then, the method generates a phase difference signal, i.e. starting a phase detection function to generate a phase difference signal. The method generates a first transition flag signal and a second transition flag signal, wherein the first transition flag signal is enable if the phase difference signal is greater than a first threshold level and the second transition flag signal is enable if the phase difference signal is smaller than the second threshold level. The method then generates a first header flag signal and a second header flag signal according to the transition flag signal. The first header flag signal is enable if the first transition flag signal becomes enable before the second transition flag does, and the second header flag signal is enable if the second transition flag signal becomes enable before the first transition flag does.
    • 公开了一种使用DPD技术产生报头和转换标志的方法以及使用其的光学装置。 该方法首先设置第一和第二阈值水平。 然后,该方法产生相位差信号,即开始相位检测功能以产生相位差信号。 该方法产生第一转变标志信号和第二转变标志信号,其中如果相位差信号大于第一阈值电平,则第一转变标志信号被使能,并且如果相位差信号较小则第二转变标志信号被使能 比第二阈值水平高。 该方法然后根据转换标志信号产生第一标题标志信号和第二标题标志信号。 如果第一转变标志信号在第二转变标志执行之前变为使能,则第一标题标志信号被使能,并且如果第二转变标志信号在第一转换标志有效之前变为使能,则第二报头标志信号被使能。
    • 3. 发明授权
    • Differential-type voltage-controlled oscillator with low-frequency
stability compensation
    • 具有低频稳定补偿的差分式压控振荡器
    • US5635878A
    • 1997-06-03
    • US546406
    • 1995-10-20
    • Ding-Jen LiuYing-Tzung Wang
    • Ding-Jen LiuYing-Tzung Wang
    • H03B1/00H03B1/04H03B5/24H03K3/0231H03L7/099
    • H03B5/24H03K3/0231H03B2201/02H03B2202/042
    • A differential-type voltage-controlled oscillator (VCO) with low-frequency stability compensation is disclosed. The differential-type VCO comprises a voltage-to-current converter for converting an input voltage signal into a biasing current signal to control the frequency of the VCO output. The VCO further comprises a number of stages of differential amplifiers connected in cascade. Each of the stages of differential amplifiers includes a pair of differential input PMOS transistors, with each of the PMOS transistors connected to a pair of NMOS load transistors. Each of the pair of NMOS load transistors are connected in parallel. The VCO further comprises a number of stages of bias circuits connected in cascade. Each of the bias circuits is connected to a corresponding stage of the differential amplifiers for receiving the bias current generated by the voltage-to-current converter. Each of the stages of bias circuits comprises a current source for supplying a constant current to maintain the low-frequency voltage-frequency linearity of the output of the VCO, and a biasing PMOS transistor connected in parallel with said current source.
    • 公开了一种具有低频稳定性补偿的差分型压控振荡器(VCO)。 差分型VCO包括电压 - 电流转换器,用于将输入电压信号转换成偏置电流信号以控制VCO输出的频率。 VCO还包括级联连接的多级差分放大器。 差分放大器的每个级包括一对差分输入PMOS晶体管,每个PMOS晶体管连接到一对NMOS负载晶体管。 一对NMOS负载晶体管中的每一个并联连接。 VCO还包括级联连接的多级偏置电路。 每个偏置电路连接到差分放大器的相应级,用于接收由电压 - 电流转换器产生的偏置电流。 偏置电路的每个级包括用于提供恒定电流以维持VCO的输出的低频电压 - 频率线性度的电流源和与所述电流源并联连接的偏置PMOS晶体管。
    • 4. 发明授权
    • Process of fabricating a bipolar junction transistor
    • 制造双极结型晶体管的工艺
    • US5489541A
    • 1996-02-06
    • US422568
    • 1995-04-14
    • Sheng-Hsing YangYing-Tzung Wang
    • Sheng-Hsing YangYing-Tzung Wang
    • H01L21/331H01L21/8222
    • H01L29/66272Y10S148/01
    • A process of fabricating a bipolar junction transistor forms, on the substrate, a masking layer including an opening, an intermediate masking portion surrounded by the opening and an outer masking portion. The masking layer consists of a pad oxide and a silicon nitride. A photoresist is then formed on the outer masking portion. A first ion implantation process at a relatively low dose and a relatively high energy is performed to form a base region underlying the intermediate masking portion, and a second ion implantation process at a relatively high dose and a relatively low energy is performed to form a base contact region underlying the opening. Then, the photoresist is removed. A field oxide is grown in the opening of the masking layer, followed by removing the masking layer. A highly-doped polysilicon layer is deposited over the structure, and a rapid thermal annealing process is performed to diffuse the impurities within the polysilicon layer into the substrate to form an emitter region in the base region and to form a collector contact region, by using the field oxide as a mask.
    • 制造双极结型晶体管的工艺在衬底上形成包括开口的掩模层,由开口包围的中间掩蔽部分和外部掩蔽部分。 掩模层由衬垫氧化物和氮化硅组成。 然后在外掩蔽部分上形成光致抗蚀剂。 以相对低的剂量和相对高的能量进行第一离子注入工艺以形成中间掩蔽部分下面的基底区域,并且以较高的剂量和较低的能量执行第二离子注入工艺以形成基底 接触区域开放的底层。 然后,去除光致抗蚀剂。 在掩模层的开口中生长场氧化物,然后除去掩模层。 在结构上沉积高度掺杂的多晶硅层,并且执行快速热退火工艺以将多晶硅层内的杂质扩散到衬底中,以在基极区域中形成发射极区域并通过使用 场氧化物作为掩模。
    • 6. 发明授权
    • Current cell of a digital-to-analog converter
    • 数模转换器的当前单元
    • US5801653A
    • 1998-09-01
    • US728561
    • 1996-10-10
    • Ding-Jeng LiuYing-Tzung WangWen-Hsin Cheng
    • Ding-Jeng LiuYing-Tzung WangWen-Hsin Cheng
    • H03M1/66
    • H03M1/0863H03M1/742
    • A current cell for converting a digital signal to an analog current signal is disclosed. The current cell includes a first PMOS transistor which receives the digital signal from a pre-stage processor by the gate. A drain of the first PMOS transistor is grounded. A second PMOS transistor has a source which is connected to the source of the first PMOS transistor, a gate which receives an inverse signal of the digital signal from the pre-stage processor, and a drain for providing the analog current signal. A third PMOS transistor is connected between a voltage source and the source of the first PMOS transistor. The third PMOS transistor has a gate to which a first reference voltage is applied.
    • 公开了一种用于将数字信号转换为模拟电流信号的电流单元。 当前单元包括第一PMOS晶体管,其通过门接收来自前级处理器的数字信号。 第一PMOS晶体管的漏极接地。 第二PMOS晶体管具有连接到第一PMOS晶体管的源极的源极,接收来自前级处理器的数字信号的反相信号的栅极和用于提供模拟电流信号的漏极。 第三PMOS晶体管连接在电压源和第一PMOS晶体管的源极之间。 第三PMOS晶体管具有施加第一参考电压的栅极。