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1. 发明授权

US4947063A Method and apparatus for reducing transient noise in integrated circuits 失效
标题翻译：降低集成电路瞬态噪声的方法和装置
公开(公告)号：US4947063A
公开(公告)日：1990-08-07
申请号：US161469
申请日：1988-02-26
申请人： Timothy G. O'Shaughnessy , David K. Chung , Richard W. Hull , Kenneth W. Ouyang , Victor G. Pierotti , Joseph A. Souza
发明人： Timothy G. O'Shaughnessy , David K. Chung , Richard W. Hull , Kenneth W. Ouyang , Victor G. Pierotti , Joseph A. Souza
IPC分类号： H03K17/16 , H03K19/003
CPC分类号： H03K17/166 , H03K17/163 , H03K19/00361
摘要： The transient noise generated at the output drivers of an integrated circuit chip is reduced by maintaining an increasing ramp shaped current through each output driver during the entire transition interval between binary states of a capacitive load. A capacitor fed by a fixed current source is connected across the input of each output driver stage. The fixed current source and capacitor are so selected as to generate across the input of each output driver stage a linear ramp shaped control voltage that regulates the charging/discharging current through the output driver stage and package inductance in the described manner. A specially designed bias circuit reduces the sensitivity of the resulting transient noise to process variations and operating conditions. A feedback connection from the package inductance to the bias control circuit for the fixed current source adjusts the fixed current inversely with the transient noise. A dynamic clamp suppresses voltage spikes extending outside the voltage supply operating range. A bias circuit arrangement compensates for sheet resistivity of the integrated circuit chip. If the resistance value of the sheet drops below a prescribed value, the fixed current is limited so it cannot exceed its designed value.
摘要翻译：在集成电路芯片的输出驱动器处产生的瞬态噪声通过在容性负载的二进制状态之间的整个转换间隔期间保持通过每个输出驱动器的斜坡形状电流而减小。由固定电流源馈送的电容器连接在每个输出驱动级的输入端。固定电流源和电容器被选择为在每个输出驱动级的输入端产生线性斜坡形控制电压，其以所述方式调节通过输出驱动级和封装电感的充电/放电电流。专门设计的偏置电路降低了所产生的瞬态噪声对工艺变化和工作条件的敏感性。从封装电感到用于固定电流源的偏置控制电路的反馈连接将与固定电流反向地调整固定电流与瞬态噪声。动态钳位电压可以抑制电压工作范围以外的电压尖峰。偏置电路布置补偿集成电路芯片的薄层电阻率。如果纸张的电阻值低于规定值，则固定电流受到限制，因此不能超过设计值。

2. 发明授权

US4868482A CMOS integrated circuit having precision resistor elements 失效
标题翻译： CMOS集成电路具有精密电阻元件
公开(公告)号：US4868482A
公开(公告)日：1989-09-19
申请号：US104398
申请日：1987-10-05
申请人： Timothy G. O'Shaughnessy , Michael R. Spaur , Kenneth W. Ouyang
发明人： Timothy G. O'Shaughnessy , Michael R. Spaur , Kenneth W. Ouyang
IPC分类号： H03F3/345 , H03H11/46
CPC分类号： H03F3/345 , H03H11/46
摘要： A circuit is provided for realizing multiple precision resistor elements on an integrated circuit by sensing a reference resistor. The circuit contains a first current source which passes a first current through a reference resistor located either on or off of the integrated circuit to generate a reference voltage. The reference voltage is applied to the inverting input of a precision high gain operational amplifier. A second current source is connected to the drain of a first MOS transistor operating in its ohmic region. The second current source is also connected to the non-inverting input of the high gain operational amplifier. The output of the operational amplifier is electrically connected to the gate of the first and second MOS transistors. In operation, a precision resistance is developed across the second MOS transistor which is equal to or some determinable multiple of the resistance of the reference precision resistor located on or off chip. An operational amplifier adaptable to this circuit is also disclosed.
摘要翻译：提供一种电路，用于通过感测参考电阻器在集成电路上实现多个精密电阻器元件。该电路包含第一电流源，该第一电流源使第一电流通过位于集成电路的导通或关闭的参考电阻以产生参考电压。参考电压施加到精密高增益运算放大器的反相输入端。第二电流源连接到在其欧姆区工作的第一MOS晶体管的漏极。第二电流源也连接到高增益运算放大器的非反相输入。运算放大器的输出电连接到第一和第二MOS晶体管的栅极。在操作中，跨第二MOS晶体管产生精密电阻，其等于或定位在芯片上或芯片上的参考精密电阻器的电阻的一些可确定的倍数。还公开了适用于该电路的运算放大器。

3. 发明授权

US4733107A Low current high precision CMOS schmitt trigger circuit 失效
标题翻译：低电流高精度CMOS施密特触发电路
公开(公告)号：US4733107A
公开(公告)日：1988-03-22
申请号：US883957
申请日：1986-07-10
申请人： Timothy G. O'Shaughnessy , Kenneth W. Ouyang
发明人： Timothy G. O'Shaughnessy , Kenneth W. Ouyang
IPC分类号： H03K3/3565 , H03K3/29 , H03K5/153
CPC分类号： H03K3/3565
摘要： A CMOS Schmitt Trigger circuit includes a differential structure for comparing an input signal with a feedback signal and a feedback circuit for providing the feedback signal with one of two voltage levels. A CMOS switch pair is connected to one or both of the differential structure and feedback circuit to provide power to the circuit only when necessary so as to minimize power consumption.
摘要翻译： CMOS施密特触发电路包括用于将输入信号与反馈信号进行比较的差分结构和用于向两个电压电平之一提供反馈信号的反馈电路。 CMOS开关对连接到差分结构和反馈电路中的一个或两个，以在必要时为电路供电，以便最小化功耗。

4. 发明授权

US4791521A Method and apparatus for reducing transient noise by premagnetization of parasitic inductance 失效
标题翻译：通过寄生电感的预磁化来减少瞬态噪声的方法和装置
公开(公告)号：US4791521A
公开(公告)日：1988-12-13
申请号：US35345
申请日：1987-04-07
申请人： Kenneth W. Ouyang , Timothy G. O'Shaughnessy
发明人： Kenneth W. Ouyang , Timothy G. O'Shaughnessy
IPC分类号： H03K17/16 , H03K19/003 , H03K19/0185 , H03K19/0948 , H02H3/20
CPC分类号： H03K17/163 , H03K17/162 , H03K19/00361
摘要： The present invention provides an apparatus and method for allowing an electronic device to drive large values of load capacitance without generating high levels of transient noise. Means are provided for passing a first current through the parasitic inductance of the integrated circuit prior to the activation of the output driver, presoaking the parasitic inductance. Thereafter, when the output driver is activated and the load capacitance discharges through the inductance of the integrated circuit, the first current is removed from as the current from the load capacitor replaces it. Since an initial level of current existed through the inductance, the rate of change of current passing through the inductance during activation of the output driver is maintained approximately constant, thereby reducing the level of transient noise generated by the electronic device.
摘要翻译：本发明提供了一种用于允许电子设备驱动大量负载电容而不产生高水平的瞬态噪声的装置和方法。提供装置，用于在激活输出驱动器之前使第一电流通过集成电路的寄生电感，从而预先建立寄生电感。此后，当输出驱动器被激活并且负载电容通过集成电路的电感放电时，从负载电容器的电流取代第一电流就将其去除。由于通过电感存在电流的初始电平，所以在输出驱动器的激活期间通过电感的电流的变化率保持大致恒定，从而降低由电子设备产生的瞬态噪声的电平。

5. 发明授权

US5115151A Triple comparator circuit 失效
标题翻译：三重比较电路
公开(公告)号：US5115151A
公开(公告)日：1992-05-19
申请号：US535177
申请日：1990-06-08
申请人： Richard W. Hull , Timothy G. O'Shaughnessy
发明人： Richard W. Hull , Timothy G. O'Shaughnessy
IPC分类号： G01R19/00 , H03K5/24
CPC分类号： H03K5/2481 , G01R19/0038
摘要： A comparator which is used to compare two analog voltages and provide a single ended output comprises three CMOS differential amplifiers. The use of three differential amplifiers provides improved matching of input capacitance, and a reduction in propagation delay over prior art use of a single differential amplifier. The comparator may be adopted for use in certain CMOS processes to extend the maximum operating voltage by limiting the internal node voltages otherwise subject to damage from impact ionization. An alternative embodiment is disclosed for comparing two analog voltages that are outside the power supply voltage range.
摘要翻译：用于比较两个模拟电压并提供单端输出的比较器包括三个CMOS差分放大器。使用三个差分放大器提供输入电容的改进的匹配，并且与现有技术中使用单个差分放大器相比传播延迟的减小。比较器可用于某些CMOS工艺中，以通过限制内部节点电压来延长最大工作电压，否则将受到冲击电离的损害。公开了用于比较在电源电压范围之外的两个模拟电压的替代实施例。

6. 发明授权

US5017919A Digital-to-analog converter with bit weight segmented arrays 失效
标题翻译：具有位权重分段阵列的数模转换器
公开(公告)号：US5017919A
公开(公告)日：1991-05-21
申请号：US533885
申请日：1990-06-06
申请人： Richard W. Hull , Timothy G. O'Shaughnessy
发明人： Richard W. Hull , Timothy G. O'Shaughnessy
IPC分类号： H03M1/68 , H03M1/74
CPC分类号： H03M1/682 , H03M1/747
摘要： A DAC embodied in a CMOS integrated circuit converts a multi-bit digital signal to an analog-current signal. A higher-order portion of the digital signal, e.g., the most significant 5 bits of a byte, are decoded separately from the lower-order portion, e.g., the 3 least significant bits. The DAC includes circuitry for producing a first bias voltage, a first set of current sources each biased by the first bias voltage to produce a switchable current having a unit magnitude, and switching circuitry controlled by the decoded lower-order portion to cause a selected number of the unit-magnitude currents to contribute to the analog-current signal. The DAC further includes circuitry for producing a second bias voltage, a second set of current sources each biased by the second bias voltage to produce a switchable current having a multi-unit magnitude, and switching circuitry controlled by the decoded higher-order portion to cause a selected number of the multi-unit-magnitude currents to contribute to the analog-current signal.
摘要翻译： CMOS集成电路中实现的DAC将多位数字信号转换为模拟电流信号。数字信号的高阶部分（例如，一个字节的最高有效5位）与低阶部分（例如3个最低有效位）分开解码。 DAC包括用于产生第一偏置电压的电路，第一组电流源，每个电流源由第一偏置电压偏置以产生具有单位幅度的可切换电流，以及由解码的低阶部分控制的开关电路以引起所选择的数量的单位幅度电流有助于模拟电流信号。 DAC还包括用于产生第二偏置电压的电路，每个由第二偏置电压偏置以产生具有多单位幅度的可切换电流的第二组电流源，以及由解码的高阶部分控制的开关电路，选择数量的多单位幅度电流以有助于模拟电流信号。

7. 发明授权

US4859873A CMOS Schmitt trigger with independently biased high/low threshold circuits 失效
标题翻译： CMOS施密特触发器，具有独立偏置的高/低阈值电路
公开(公告)号：US4859873A
公开(公告)日：1989-08-22
申请号：US74905
申请日：1987-07-17
申请人： Timothy G. O'Shaughnessy , Richard W. Hull
发明人： Timothy G. O'Shaughnessy , Richard W. Hull
IPC分类号： H03K3/037 , H03K3/3565
CPC分类号： H03K3/0377 , H03K3/3565
摘要： A Schmitt trigger circuit with independently biased threshold sections includes a drive disabling switch for blocking one of the threshold sections from driving a logic node toward a predetermined logic state. The drive disabling switch is selectively operated so that unidirectional sensitivity to the crossing of a threshold level belonging to its corresponding one threshold section is obtained.
摘要翻译：具有独立偏置的阈值部分的施密特特触发电路包括用于阻断阈值部分之一的驱动器禁用开关以将逻辑节点驱动到预定的逻辑状态。选择性地操作驱动器禁用开关，从而获得对属于其对应的一个阈值部分的阈值电平的交叉的单向灵敏度。

8. 发明授权

US4904884A Schmitt trigger adapted to interface between different transistor architectures 失效
标题翻译：施密特触发器适用于不同晶体管结构之间的接口
公开(公告)号：US4904884A
公开(公告)日：1990-02-27
申请号：US184243
申请日：1988-04-21
申请人： Timothy G. O'Shaughnessy , David K. Chung
发明人： Timothy G. O'Shaughnessy , David K. Chung
IPC分类号： H03K3/3565
CPC分类号： H03K3/3565
摘要： A Schmitt trigger having first and second complementary switches is biased to exhibit hysteresis, switching at a high threshold level when the input signal increases, and switching at a low threshold level when the input decreases. The source driver for the Schmitt trigger is coupled to the input of at least one of the complementary switches by transition circuitry, such that the signal level representing one binary value is shifted closer to the level of the power supply voltage corresponding to such binary value without changing the logical value of the signal from the source driver. In one embodiment, the first inverter is a MOS transistor, the threshold level of which is set by a bias voltage applied to the gate of another MOS transistor. The second inverter is a pair of complementary CMOS transistors. In another embodiment, the first inverter also comprises a pair of complementary CMOS transistors. The threshold level is set by selecting the W/L ratio of the CMOS transistors of the first inverter. In another embodiment the first inverter comprises a differential amplifier.
摘要翻译：具有第一和第二互补开关的施密特触发器被偏置以呈现迟滞，当输入信号增加时以高阈值电平切换，并且当输入减小时切换为低阈值电平。施密特触发器的源极驱动器通过转换电路耦合至至少一个互补开关的输入，使得表示一个二进制值的信号电平更接近于对应于这样的二进制值的电源电压的电平，而没有改变来自源驱动器的信号的逻辑值。在一个实施例中，第一反相器是MOS晶体管，其阈值电平由施加到另一个MOS晶体管的栅极的偏置电压来设置。第二个反相器是一对互补CMOS晶体管。在另一实施例中，第一反相器还包括一对互补CMOS晶体管。通过选择第一反相器的CMOS晶体管的W / L比来设置阈值电平。在另一个实施例中，第一反相器包括差分放大器。

9. 发明授权

US5594388A Self-calibrating RC oscillator 失效
标题翻译：自校准RC振荡器
公开(公告)号：US5594388A
公开(公告)日：1997-01-14
申请号：US479304
申请日：1995-06-07
申请人： Timothy G. O'Shaughnessy , David G. Brown
发明人： Timothy G. O'Shaughnessy , David G. Brown
IPC分类号： H03K3/03 , H03B5/20 , H03K3/0231 , H03L7/02
CPC分类号： H03K3/03
摘要： An RC oscillator includes an RC network for forming a time constant equal to the RC product. However, this RC time constant is not used in the manner of a typical RC network to set the frequency of oscillation. Instead, the RC oscillator disclosed herein includes a separate oscillator, such as a voltage-controlled oscillator (VCO), and uses the RC time constant to compare with the oscillator-generated period and to adjust the frequency of the overall RC oscillator circuit in accordance with the comparison. The RC oscillator is self-calibrating.
摘要翻译： RC振荡器包括用于形成等于RC乘积的时间常数的RC网络。然而，这种RC时间常数不是以典型的RC网络的方式来设置振荡频率。相反，本文公开的RC振荡器包括单独的振荡器，例如压控振荡器（VCO），并且使用RC时间常数来与振荡器产生的周期进行比较，并且根据RC振荡器电路的频率调整与比较。 RC振荡器是自校准的。

10. 发明授权

US5552748A Digitally-tuned oscillator including a self-calibrating RC oscillator circuit 失效
标题翻译：数字调谐振荡器包括一个自校准RC振荡电路
公开(公告)号：US5552748A
公开(公告)日：1996-09-03
申请号：US479299
申请日：1995-06-07
申请人： Timothy G. O'Shaughnessy
发明人： Timothy G. O'Shaughnessy
IPC分类号： H03B1/00 , H03B5/20 , H03D13/00 , H03K3/03 , H03L7/00 , H03B5/24
CPC分类号： H03L7/00 , H03B5/20 , H03K3/03 , H03B2201/0283 , H03D13/004 , H03J2200/10
摘要： A digitally-tuned oscillator (DTO) includes a digital-to-analog converter (DAC) and an RC oscillator. The RC oscillator includes an RC circuit for forming a time constant equal to the RC product. However, this RC time constant is not used in the manner of a typical RC network to set the frequency of oscillation. Instead, the RC oscillator disclosed herein includes a separate oscillator, such as a voltage-controlled oscillator (VCO), and uses the RC time constant to compare with the oscillator-generated period and to adjust the frequency of the overall RC oscillator circuit in accordance with the comparison. The RC oscillator is self-calibrating.
摘要翻译：数字调谐振荡器（DTO）包括数模转换器（DAC）和RC振荡器。 RC振荡器包括用于形成等于RC积的时间常数的RC电路。然而，这种RC时间常数不是以典型的RC网络的方式来设置振荡频率。相反，本文公开的RC振荡器包括单独的振荡器，例如压控振荡器（VCO），并且使用RC时间常数来与振荡器产生的周期进行比较，并且根据RC振荡器电路的频率调整与比较。 RC振荡器是自校准的。

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