公开(公告)号：US20050168207A1

公开(公告)日：2005-08-04

申请号：US11045885

申请日：2005-01-27

申请人： Michael Daly ,  Evaldo Miranda ,  David Thomson ,  A. Brokaw

发明人： Michael Daly ,  Evaldo Miranda ,  David Thomson ,  A. Brokaw

IPC分类号： G05F3/30 ,  H02M5/42

CPC分类号： G05F3/30

摘要： A voltage source includes first and second pn junctions which conduct the outputs of respective current sources to establish respective base-emitter voltages Vbe1 and Vbe2 at respective nodes; Vbe1 and Vbe2 can each be generated with a current I or a current N*I. An amplifier A1 has its non-inverting input connected to the second node and its inverting input connected to the first node through an input capacitor; a feedback capacitor is connected between the inverting input and a third node. Switches are connected between A1's inverting input and A1's output, between the third node and A1's output, and between the third node and a circuit common point. A control circuit operates the switches and current sources during first and second operating phases to selectively produce a temperature independent output voltage or a temperature dependent output voltage.

摘要翻译： 电压源包括第一和第二pn结，其传导各个电流源的输出，以在各个节点处建立相应的基极 - 发射极电压V SUB1和V OUT2; 每个可以用电流I或电流N * I产生V a1和V BAT2。 放大器A 1具有连接到第二节点的同相输入端，其反相输入端通过输入电容器连接到第一节点; 反相电容器连接在反相输入和第三个节点之间。 开关连接在A 1的反相输入和A 1的输出之间，在第三个节点和A 1的输出之间，以及第三个节点和电路公共点之间。 控制电路在第一和第二操作阶段期间操作开关和电流源以选择性地产生与温度无关的输出电压或与温度相关的输出电压。

公开(公告)号：US20070001744A1

公开(公告)日：2007-01-04

申请号：US11170970

申请日：2005-06-29

申请人： Evaldo Miranda ,  A. Brokaw

发明人： Evaldo Miranda ,  A. Brokaw

IPC分类号： H01L35/00

CPC分类号： G01K7/01

摘要： A switched current temperature sensing circuit comprises a BJT arranged to conduct a forced emitter current IE of the form Ifixed+(Ifixed/β), such that the base current is given by Ifixed/β and the collector current is given by Ifixed+(Ifixed/β)−(Ifixed/β)=Ifixed. Base current Ifixed/β is mirrored to the emitter, and a current source provides current Ifixed, which is switched between at least a first value I and a second value N*I such that the BJT's base-emitter voltage has a first value Vbe1 when Ifixed=I and a second value Vbe2 when Ifixed=N*I, such that: ΔVbe12=Vbe1−Vbe2=(nFkT/q)(ln N), where nF is the BJT's emission coefficient, k is Boltzmann's constant, T is absolute temperature, and q is the electron charge.

摘要翻译： 开关电流温度检测电路包括布置成传导形式为固定的固体的强制发射极电流I B的BJT（固定的/ ），使得基极电流由I固定 /β给出，并且集电极电流由I固定 ） - （I <固定 /β）= I固定。 基极电流I <固定 /β被镜像到发射极，并且电流源提供电流I <固定，其在至少第一值I和第二值N之间切换 * I，使得当I固定 = I时，BJT的基极 - 发射极电压具有第一值V sub1n1，并且当I _{固定 = N * I，使得：<？in-line-formula description =“In-line Formulas”end =“lead”？> DeltaV = （ln N），<？in-line-formula description =“In-line-formula” 公式“end =”tail“？>其中n 是BJT的发射系数，k是玻耳兹曼常数，T是绝对温度，q是电子电荷。}

公开(公告)号：US20060164170A1

公开(公告)日：2006-07-27

申请号：US11313545

申请日：2005-12-20

申请人： A. Brokaw

发明人： A. Brokaw

IPC分类号： H03F3/16

CPC分类号： H03F3/45278 ,  H03F1/3211 ,  H03F1/34 ,  H03F1/52 ,  H03F3/343 ,  H03F3/3435 ,  H03F3/345 ,  H03F3/42 ,  H03F3/4578 ,  H03F3/50 ,  H03F2200/426 ,  H03F2200/45 ,  H03F2200/91 ,  H03F2203/45526 ,  H03F2203/45722

摘要： A small signal amplifier with a large signal output boost stage are connected between first and second supply rails. The small signal amplifier receives first and second input signals and provides an output signal at an output node which drives a load. Under small signal conditions, the output signal varies approximately linearly with the difference voltage. However, under large signal conditions, a rail-to-rail large signal output boost stage connected to the output node is arranged to drive the output node close to the first or second supply rail as needed to provide the current demanded by the load. The large signal output boost stage is off in small signal conditions, but comes on rapidly and transfers maximum charge to the load under large signal conditions.

摘要翻译： 具有大信号输出升压级的小信号放大器连接在第一和第二电源轨之间。 小信号放大器接收第一和第二输入信号，并在驱动负载的输出节点处提供输出信号。 在小信号条件下，输出信号随差电压大致线性变化。 然而，在大信号条件下，连接到输出节点的轨到轨大信号输出升压级被布置成根据需要驱动靠近第一或第二供电轨的输出节点以提供负载所要求的电流。 大信号输出增强级在小信号条件下关闭，但快速进行，并在大信号条件下向负载传输最大电荷。

公开(公告)号：US20050194957A1

公开(公告)日：2005-09-08

申请号：US11064668

申请日：2005-02-23

申请人： A. Brokaw

发明人： A. Brokaw

IPC分类号： G05F3/16

CPC分类号： G05F3/30 ,  Y10S323/907

摘要： A curvature corrected bandgap reference circuit comprises a first bipolar transistor having a base-emitter voltage Vbe1 and operated such that it has a constant operating current, and a second bipolar transistor having a base-emitter voltage Vbe2 and operated such that it has an operating current consisting of an approximately temperature proportional component and a non-linear component. The circuit is arranged such that the ratio of the current densities in the two transistors varies with temperature, such that the difference voltage (ΔVbe=Vbe1−Vbe2) includes a residual component which approximately compensates bandgap curvature error.

摘要翻译： 曲率校正带隙参考电路包括具有基极 - 发射极电压V bias的第一双极晶体管，并且使其具有恒定的工作电流，并且具有基极 - 发射极电压V' 并且操作使得其具有由近似温度成比例的分量和非线性分量组成的工作电流。 电路被布置成使得两个晶体管中的电流密度的比率随着温度而变化，使得差值电压（DeltaV）= V < 包括近似补偿带隙曲率误差的残余分量。

公开(公告)号：US20070205295A1

公开(公告)日：2007-09-06

申请号：US11370155

申请日：2006-03-06

申请人： Chau Tran ,  A. Brokaw

发明人： Chau Tran ,  A. Brokaw

IPC分类号： F23N5/20 ,  G05D23/00

CPC分类号： G05D23/1904 ,  Y10S323/907

摘要： A temperature setpoint circuit comprises bipolar transistors Q1 and Q2 which receive currents I1 and I2 at their respective collectors and are operated at unequal current densities, with a resistance R1 connected between their bases such that the difference in their base-emitter voltages (ΔVbe) appears across R1. An additional PTAT current I3 is maintained in a constant ratio to I1 and I2 and provided to the collector of Q2 while Q2 is off, and is not provided while Q2 is on. The circuit is arranged such that Q2 is turned on and conducts a current equal to Ia when: ΔVbe=(kT/q)ln(NI1/Ia), where Ia=I2+I3, the temperature T at which ΔVbe=(kT/q)ln(NI1/Ia) being the circuit's setpoint temperature, such that the switching of current I3 provides hysteresis for the setpoint temperature which is approximately constant over temperature.

摘要翻译： 温度设定点电路包括在其各自的集电极处接收电流I 1和I 2并且以不相等的电流密度工作的双极晶体管Q 1和Q 2，其电阻R 1连接在它们的基极之间，使得它们的基极 - 发射极 电压（DeltaV ）出现在R 1上。 另外的PTAT电流I 3以与I 1和I 2恒定的比例保持，并且在Q 2断开时提供给Q 2的集电极，并且在Q 2接通时不提供。 电路被布置为使得Q 2导通，并且当以下情况下导通等于Ia的电流：ΔV=（kT / q）ln（NI 1 / Ia），其中Ia = I 2 + I 如图3所示，DeltaV =（kT / q）ln（NI 1 / Ia）的温度T是电路的设定点温度，使得电流I 3的切换为设定点温度提供迟滞 在温度范围内大致恒定。

公开(公告)号：US20070109062A1

公开(公告)日：2007-05-17

申请号：US11280516

申请日：2005-11-15

申请人： A. Brokaw ,  Yuxin Li

发明人： A. Brokaw ,  Yuxin Li

IPC分类号： H03K3/26

CPC分类号： H03K3/011 ,  H03K3/354 ,  H03K3/355

摘要： A timing circuit operates by applying an arbitrary voltage across a resistance, and using the resulting current to generate a charging current which charges and/or discharges a capacitance to an endpoint voltage. Additional circuitry is arranged such that the capacitance is charged and/or discharged until its voltage crosses a threshold which is proportional to one of the resistance's endpoint voltages, such that the capacitance's endpoint voltage tracks the resistance's endpoint voltage. Thus, the resistor voltage can vary with supply voltage or temperature, or the resistance value itself can vary, without materially affecting the timing relationships. The arbitrary voltage is preferably provided with a pair of diode-connected transistors connected in series with the resistance, so that a single transistor operated at the same current density as one of the diode-connected transistors establishes the threshold voltage and detects when the capacitor voltage reaches the threshold.

摘要翻译： 定时电路通过在电阻上施加任意电压来工作，并且使用所得到的电流来产生将电容充电和/或放电到端点电压的充电电流。 附加电路被布置成使得电容被充电和/或放电，直到其电压跨过与电阻的端点电压之一成比例的阈值，使得电容的端点电压跟踪电阻的端点电压。 因此，电阻电压可以随电源电压或温度而变化，或者电阻值本身可以变化，而不会严重影响时序关系。 任意电压优选地设置有与电阻串联连接的一对二极管连接的晶体管，使得以与二极管连接的晶体管中的一个相同的电流密度工作的单个晶体管建立阈值电压并且检测何时电容器电压 达到门槛。

公开(公告)号：US20060232340A1

公开(公告)日：2006-10-19

申请号：US11108990

申请日：2005-04-18

申请人： A. Brokaw

发明人： A. Brokaw

IPC分类号： H03F3/04

CPC分类号： G05F3/262 ,  H03F1/22 ,  H03F1/223 ,  H03F1/30 ,  H03F1/301 ,  H03F1/302 ,  H03F3/04 ,  H03F3/45475 ,  H03F2203/45676

摘要： A current mirror circuit includes a current input node for receiving an input current, an upper, cascoded current mirror, a lower current mirror, and a biasing means. In a FET implementation, the upper mirror includes first and second cascoded FETs which are connected together at the current input node, and third and fourth cascoded FETs connected to mirror the current conducted by the first and second FETs. The lower current mirror receives the mirrored current and mirrors it back to the upper mirror, thereby providing positive feedback. The net loop gain is between zero and one. When so arranged, the third and fourth FETs conduct a current which is proportional to an applied input current. The upper mirror transistors are biased such that the voltage at the current input node is substantially closer to the supply voltage than the voltages at the gates of the first and third FETs.

摘要翻译： 电流镜电路包括用于接收输入电流的电流输入节点，上级并联电流镜，下电流镜和偏置装置。 在FET实现中，上反射镜包括在电流输入节点处连接在一起的第一和第二并联FET，以及连接到第一和第二FET传导的电流的第三和第四级联的FET。 下电流镜接收镜像电流并将其反射回上镜，从而提供正反馈。 净环路增益在零和一之间。 当这样布置时，第三和第四FET导通与施加的输入电流成比例的电流。 上反射镜晶体管被偏置，使得电流输入节点处的电压基本上比第一和第三FET的栅极处的电压更接近电源电压。

公开(公告)号：US20060164165A1

公开(公告)日：2006-07-27

申请号：US11337041

申请日：2006-01-19

申请人： A. Brokaw

发明人： A. Brokaw

IPC分类号： H03F3/45

CPC分类号： H03F3/3022 ,  H03F1/34

摘要： An amplifier output voltage swing extender circuit comprises a differential amplifier powered between first and second power supply rails, which receives first and second input signals at non-inverting and inverting inputs, respectively, and provides an output at a first output node. A level shifting circuit, preferably a voltage divider, is connected in series with the first output node and shifts the node voltage toward the second rail by a fixed amount; the shifted voltage is provided at a second output node. A feedback network couples the second output node voltage to the amplifier's inverting input, such that when a voltage VSET is applied to the non-inverting input, the maximum negative voltage excursion at the first and second output nodes is greater than the value of the VSET voltage with respect to the second supply rail.

摘要翻译： 放大器输出电压摆幅扩展器电路包括在第一和第二电源轨之间供电的差分放大器，其分别在非反相和反相输入端接收第一和第二输入信号，并在第一输出节点处提供输出。 电平移位电路，优选地是分压器，与第一输出节点串联连接，并将节点电压朝向第二轨道移动固定的量; 在第二输出节点处提供移位的电压。 反馈网络将第二输出节点电压耦合到放大器的反相输入，使得当电压VSET被施加到非反相输入时，第一和第二输出节点处的最大负电压偏移大于VSET的值 电压相对于第二电源轨。