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公开(公告)号：US20060001449A1
公开(公告)日：2006-01-05
申请号：US10881192
申请日：2004-06-30
IPC分类号： H03K19/0175
CPC分类号： H03K3/356113 , H03K17/102
摘要： A voltage level translator circuit for translating an input signal referenced to a first voltage level to an output signal referenced to a second voltage level includes an input stage for receiving the input signal. The input stage includes at least one transistor device having a first threshold voltage associated therewith. The voltage level translator circuit further includes a latch circuit operative to store a signal representative of a logical state of the input signal. The latch circuit includes at least one transistor device having a second threshold voltage associated therewith, the second threshold voltage being greater than the first threshold voltage. A voltage clamp is operatively connected between the input stage and the latch circuit, the voltage clamp being configured to limit a voltage across the input stage based, at least in part, on a control signal presented thereto. The voltage level translator circuit includes a reference generator circuit for generating the control signal, a steady state value of the control signal being substantially equal to the first voltage level. The reference generator circuit is configured to adjust a voltage level of the control signal in response to the input signal.
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公开(公告)号：US20070019348A1
公开(公告)日：2007-01-25
申请号：US11169139
申请日：2005-06-28
IPC分类号： H02H9/04
CPC分类号： H03K19/00315 , H03K2217/0018
摘要： A buffer circuit having enhanced overvoltage protection includes core buffer circuitry couplable to a first voltage source having a first voltage level. The core buffer circuitry is configured to receive a first signal and to generate a second signal which is a function of the first signal. The buffer circuit further includes a protection circuit coupled between the core buffer circuitry and a signal pad. The protection circuit is operative: (i) to clamp the first signal to about the first voltage level when a third signal received at the signal pad exceeds the first voltage level by a first amount; and (ii) to generate the first signal being substantially equal to the third signal when the third signal is less than or substantially equal to the first voltage level.
摘要翻译： 具有增强的过电压保护的缓冲电路包括可耦合到具有第一电压电平的第一电压源的核心缓冲电路。 核心缓冲器电路被配置为接收第一信号并产生作为第一信号的函数的第二信号。 缓冲电路还包括耦合在核心缓冲器电路和信号焊盘之间的保护电路。 保护电路是可操作的：（i）当在信号焊盘处接收的第三信号超过第一电压电平达到第一量值时，将第一信号钳位到约第一电压电平; 和（ii）当第三信号小于或基本上等于第一电压电平时，产生基本上等于第三信号的第一信号。
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公开(公告)号：US20070229157A1
公开(公告)日：2007-10-04
申请号：US11393171
申请日：2006-03-30
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F2200/513 , H03F2200/78 , H03F2203/45314 , H03F2203/45361 , H03F2203/45552 , H03F2203/45684
摘要： A circuit having an enhanced input signal range includes a differential amplifier operative to receive at least first and second signals and to amplify a difference between the first and second signals. The differential amplifier generates a difference signal at an output thereof which is a function of the difference between the first and second signals. The differential amplifier includes an input stage having at least first and second transistors operative to receive the first and second signals, respectively, each of the first and second transistors having a first threshold voltage associated therewith, and a load including at least third and fourth transistors having a second threshold voltage associated therewith, the first threshold voltage being greater than the second threshold voltage. The circuit further includes an output stage coupled to the differential amplifier and being operative to receive the difference signal and to generate an output signal of the circuit, the output signal being indicative of the difference signal and being referenced to the first voltage. The circuit is configured to accept the first and second signals having a voltage swing which is potentially greater than a supply voltage of the circuit.
摘要翻译： 具有增强的输入信号范围的电路包括差分放大器，其可操作以接收至少第一和第二信号并放大第一和第二信号之间的差。 差分放大器在其输出处产生差分信号，其作为第一和第二信号之间的差异的函数。 差分放大器包括具有至少第一和第二晶体管的输入级，其中第一和第二晶体管分别用于接收第一和第二信号，第一和第二晶体管中的每一个具有与之相关联的第一阈值电压，并且负载包括至少第三和第四晶体管 具有与其相关联的第二阈值电压，所述第一阈值电压大于所述第二阈值电压。 电路还包括耦合到差分放大器的输出级，并且可操作以接收差分信号并产生电路的输出信号，输出信号指示差分信号并参考第一电压。 电路被配置为接受具有潜在地大于电路的电源电压的电压摆幅的第一和第二信号。
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公开(公告)号：US20070115030A1
公开(公告)日：2007-05-24
申请号：US11285800
申请日：2005-11-23
IPC分类号： H03K19/094
CPC分类号： H04L25/0276
摘要： A differential buffer circuit includes a current source, a current sink, and a switching circuit connected to the current source at a first node and connected to the current sink at a second node. The switching circuit is operative to selectively control a direction of current flowing through differential outputs of the buffer circuit in response to at least a first control signal. The buffer circuit further includes a common mode detection circuit and a common mode control circuit. The common mode detection circuit is operative to detect an output common mode voltage of the buffer circuit and to generate a second control signal representative of the output common mode voltage. The common mode control circuit includes a first terminal connected to the current source and a second terminal connected to the current sink. The common mode control circuit is operative to selectively control the output common mode voltage of the buffer circuit as a function of the second control signal.
摘要翻译： 差分缓冲电路包括电流源，电流吸收器和连接到第一节点处的电流源并在第二节点处连接到电流宿的开关电路。 开关电路可操作以响应于至少第一控制信号选择性地控制流过缓冲电路的差分输出的电流的方向。 缓冲电路还包括共模检测电路和共模控制电路。 共模检测电路用于检测缓冲电路的输出共模电压，并产生表示输出共模电压的第二控制信号。 共模控制电路包括连接到电流源的第一端子和连接到电流阱的第二端子。 共模控制电路用于根据第二控制信号有选择地控制缓冲电路的输出共模电压。
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公开(公告)号：US20060192587A1
公开(公告)日：2006-08-31
申请号：US11065785
申请日：2005-02-25
IPC分类号： H03K19/0175
CPC分类号： H03K3/012 , H03K3/356113 , H03K17/102
摘要： A voltage level translator circuit is selectively operable in one of at least two modes in response to a control signal. In a first mode, the voltage level translator circuit is operative to translate an input signal referenced to a first source providing a first voltage to an output signal referenced to a second source providing a second voltage. In a second mode, the voltage level translator circuit is operative to provide a signal path from an input of the voltage translator circuit to an output thereof without translating the input signal. The control signal is indicative of a difference between the first voltage and the second voltage.
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公开(公告)号：US20060170461A1
公开(公告)日：2006-08-03
申请号：US11046995
申请日：2005-01-31
IPC分类号： H03K5/22
CPC分类号： H03K5/2481 , H03K5/12
摘要： A comparator circuit having reduced pulse width distortion includes a differential amplifier operative to receive at least first and second signals and to amplify a difference between the first and second signals. The differential amplifier generates a difference signal at an output thereof which is a function of the difference between the first and second signals. An output stage is included in the comparator circuit for receiving the difference signal and for generating an output signal of the comparator circuit, the output signal being representative of the difference signal, the output stage having a switching point associated therewith. The comparator circuit further includes a voltage source coupled to the output of the differential amplifier. The voltage source is operative to generate a reference signal for establishing a common-mode voltage of the difference signal generated by the differential amplifier. The reference signal is substantially centered about the switching point of the output stage and substantially tracks the switching point over variations in process, voltage and/or temperature conditions to which the comparator circuit is subjected.
摘要翻译： 具有减小的脉冲宽度失真的比较器电路包括差分放大器，其操作以接收至少第一和第二信号并且放大第一和第二信号之间的差。 差分放大器在其输出处产生差分信号，其作为第一和第二信号之间的差异的函数。 输出级包括在比较器电路中，用于接收差分信号并产生比较器电路的输出信号，该输出信号代表差分信号，输出级具有与之相关的切换点。 比较器电路还包括耦合到差分放大器的输出的电压源。 电压源用于产生用于建立由差分放大器产生的差分信号的共模电压的参考信号。 参考信号基本上以输出级的切换点为中心，并且基本上跟踪比较器电路所经受的过程，电压和/或温度条件变化的切换点。
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公开(公告)号：US20070176635A1
公开(公告)日：2007-08-02
申请号：US11342175
申请日：2006-01-27
IPC分类号： H03K19/0175
CPC分类号： H03K19/017509 , H03K3/356104
摘要： A voltage level translator circuit for translating an input signal referenced to a first voltage supply to an output signal referenced to a second voltage supply includes an input stage for receiving the input signal, the input stage including at least one transistor device having a first threshold voltage associated therewith. The voltage level translator circuit further includes a latch circuit operative to store a signal representative of a logic state of the input signal, the latch circuit including at least one transistor device having a second threshold voltage associated therewith, the second threshold voltage being greater than the first threshold voltage. A voltage clamp circuit is connected between the input stage and the latch circuit. The voltage clamp circuit is operative to limit a voltage across the input stage, an amplitude of the voltage across the input stage being controlled as a function of a voltage difference between the first and second voltage supplies.
摘要翻译： 用于将参考第一电压源的输入信号转换为参考第二电压源的输出信号的电压电平转换器电路包括用于接收输入信号的输入级，该输入级包括至少一个具有第一阈值电压 相关联。 电压电平转换器电路还包括锁存电路，其操作以存储表示输入信号的逻辑状态的信号，所述锁存电路包括具有与其相关联的第二阈值电压的至少一个晶体管器件，所述第二阈值电压大于 第一阈值电压。 电压钳位电路连接在输入级和锁存电路之间。 电压钳位电路用于限制输入级两端的电压，输入级两端的电压幅度作为第一和第二电压源之间的电压差的函数被控制。
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公开(公告)号：US20070075748A1
公开(公告)日：2007-04-05
申请号：US11239840
申请日：2005-09-30
申请人： Dipankar Bhattacharya , Makeshwar Kothandaraman , John Kriz , Duane Loeper , Bernard Morris , Yehuda Smooha
发明人： Dipankar Bhattacharya , Makeshwar Kothandaraman , John Kriz , Duane Loeper , Bernard Morris , Yehuda Smooha
IPC分类号： H03K5/22
CPC分类号： H03K19/00315 , H03K2217/0018
摘要： A circuit for defining a voltage potential of a floating well in which is formed at least one metal-oxide-semiconductor device includes a sense circuit operative to detect a voltage at a node to which the floating well is connected and to generate a control signal indicative of whether the voltage at the node is substantially within a voltage range. A lower value of the voltage range is substantially equal to a threshold voltage below a first supply voltage of the circuit. An upper value of the voltage range is substantially equal to a threshold voltage above the first supply voltage. The circuit for defining the voltage potential of the floating well further includes a voltage generator circuit operative to receive the control signal and to generate a bias signal for setting a voltage potential of the well in response to the control signal, the bias signal being controlled throughout the voltage range.
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公开(公告)号：US20070046338A1
公开(公告)日：2007-03-01
申请号：US11215663
申请日：2005-08-30
IPC分类号： H03B1/00
CPC分类号： H03K19/018585 , H03K19/018521 , H03K19/018592
摘要： A buffer circuit operative at multiple power supply voltage levels includes first and second buffers, the first buffer being configured for operation with a first voltage source and the second buffer being operative with a second voltage source. The buffer circuit further includes a controllable isolation circuit. An output of the first buffer connects to an external pad of the buffer circuit, and an output of the second buffer connects to the pad via the isolation circuit. The buffer circuit is selectively operative in at least a first mode or a second mode in response to at least a first control signal. The isolation circuit is operative in the first mode to substantially isolate the second buffer from the external pad and is operative in the second mode to connect the output of the second buffer to the external pad.
摘要翻译： 在多个电源电压电平下工作的缓冲电路包括第一和第二缓冲器，第一缓冲器被配置为与第一电压源一起操作，第二缓冲器与第二电压源一起工作。 缓冲电路还包括可控隔离电路。 第一缓冲器的输出连接到缓冲电路的外部焊盘，第二缓冲器的输出经由隔离电路连接到焊盘。 响应于至少第一控制信号，缓冲器电路以至少第一模式或第二模式选择性地工作。 隔离电路在第一模式下工作，以将第二缓冲器与外部焊盘基本隔离，并且在第二模式下工作，以将第二缓冲器的输出连接到外部焊盘。
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公开(公告)号：US20060145749A1
公开(公告)日：2006-07-06
申请号：US11026426
申请日：2004-12-30
IPC分类号： G05F1/10
CPC分类号： G05F3/205
摘要： A bias circuit includes a reference generator for generating a bias signal at an output of the reference generator. The reference generator is selectively operable a first mode or a second mode in response to a first control signal applied to the reference generator, wherein in the first mode of operation, the reference generator is disabled, and in the second mode of operation, the reference generator is operative to generate the bias signal. The bias circuit further includes a shunt circuit connected to the reference generator. The shunt circuit is configured to provide a source of current to assist in charging the output of the reference generator to a quiescent operating level during the second mode of operation. The shunt circuit, in response to a second control signal applied thereto, is operable for a selected period time after the reference generator transitions from the first mode of operation to the second mode of operation.
摘要翻译： 偏置电路包括用于在参考发生器的输出处产生偏置信号的参考发生器。 参考发生器响应于施加到参考发生器的第一控制信号而选择性地操作第一模式或第二模式，其中在第一操作模式中，参考发生器被禁用，并且在第二操作模式中， 发生器用于产生偏置信号。 偏置电路还包括连接到参考发生器的分流电路。 分流电路被配置为提供电流源以帮助在第二操作模式期间将参考发生器的输出充电到静止工作电平。 分流电路响应于施加到其上的第二控制信号可在参考发生器从第一操作模式转换到第二操作模式之后的所选时段内操作。
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