公开(公告)号：US08441309B2

公开(公告)日：2013-05-14

申请号：US13604989

申请日：2012-09-06

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

摘要翻译： 独立于温度的参考电路包括具有共同耦合的基极的第一和第二双极晶体管。 第一和第二电阻串联耦合在第二双极晶体管的发射极和地之间。 第一和第二电阻器分别具有第一和第二电阻值R1和R2，以及第三和第二温度系数TC3和TC2。 电阻值使得第一和第二双极晶体管的基极 - 发射极之间的电压TC1的温度系数基本上等于TC2×（R2 /（R1 + R2））+ TC3×（R1 / R1 + R2）），导致流经第一和第二双极晶体管中的每一个的参考电流在温度上基本恒定。 耦合在第二双极晶体管的节点和集电极之间的第三电阻器具有使得在节点处产生的参考电压在温度上基本恒定的值。

公开(公告)号：US20120326697A1

公开(公告)日：2012-12-27

申请号：US13604989

申请日：2012-09-06

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F3/16

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

摘要翻译： 独立于温度的参考电路包括具有共同耦合的基极的第一和第二双极晶体管。 第一和第二电阻串联耦合在第二双极晶体管的发射极和地之间。 第一和第二电阻器分别具有第一和第二电阻值R1和R2，以及第三和第二温度系数TC3和TC2。 电阻值使得第一和第二双极晶体管的基极 - 发射极之间的电压TC1的温度系数基本上等于TC2×（R2 /（R1 + R2））+ TC3×（R1 / R1 + R2）），导致流经第一和第二双极晶体管中的每一个的参考电流在温度上基本恒定。 耦合在第二双极晶体管的节点和集电极之间的第三电阻器具有使得在节点处产生的参考电压在温度上基本恒定的值。

公开(公告)号：US08063622B2

公开(公告)日：2011-11-22

申请号：US12572952

申请日：2009-10-02

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/00 ,  G05F1/10

CPC分类号： H02M1/36 ,  H02M2001/0029

摘要： A circuit to control the slew rate of charging a capacitance using the capacitance is disclosed. An example circuit includes a regulator circuit to regulate a supply voltage during a normal operation mode of the circuit. A capacitance circuit is coupled to the regulator circuit. The regulator circuit is coupled to charge a capacitance between a first node and a second node of the capacitance circuit with a charge current. A slew rate control circuit is coupled to the regulator circuit and the capacitance circuit. The slew rate control circuit sets a slew rate of a voltage between the first and second nodes during a power up mode of the circuit.

摘要翻译： 公开了一种使用该电容来控制对电容充电的转换速率的电路。 示例电路包括调节器电路，以在电路的正常操作模式期间调节电源电压。 电容电路耦合到调节器电路。 该调节器电路被耦合以用充电电流对电容电路的第一节点和第二节点之间的电容进行充电。 压摆率控制电路耦合到调节器电路和电容电路。 压摆率控制电路在电路的上电模式期间设置第一和第二节点之间的电压的压摆率。

公开(公告)号：US08278994B2

公开(公告)日：2012-10-02

申请号：US13398116

申请日：2012-02-16

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

摘要翻译： 独立于温度的参考电路包括具有共同耦合的基极的第一和第二双极晶体管。 第一和第二电阻串联耦合在第二双极晶体管的发射极和地之间。 第一和第二电阻器分别具有第一和第二电阻值R1和R2，以及第三和第二温度系数TC3和TC2。 电阻值使得第一和第二双极晶体管的基极 - 发射极之间的电压TC1的温度系数基本上等于TC2×（R2 /（R1 + R2））+ TC3×（R1 /（ R1 + R2）），导致流经第一和第二双极晶体管中的每一个的参考电流在温度上基本恒定。 耦合在第二双极晶体管的节点和集电极之间的第三电阻器具有使得在节点处产生的参考电压在温度上基本恒定的值。

公开(公告)号：US20120068680A1

公开(公告)日：2012-03-22

申请号：US13272950

申请日：2011-10-13

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/10

CPC分类号： H02M1/36 ,  H02M2001/0029

摘要： An example circuit includes a regulator circuit coupled to first and second nodes. A capacitance circuit and a slew rate control circuit are coupled between the first and second nodes. The regulator circuit is coupled to charge a capacitance of the capacitance circuit with a charge current. The slew rate control circuit is coupled to control a change in voltage over change in time between the first and second nodes during a power up mode of the circuit. The slew rate control circuit further includes a switch and a resistor. The slew rate control circuit is coupled to switch the switch in response to a voltage between the first and second nodes. A voltage drop across the resistor is limited to a base-emitter voltage drop of a transistor coupled between the first and second nodes to set the change in voltage over change in time.

摘要翻译： 示例电路包括耦合到第一和第二节点的调节器电路。 电容电路和转换速率控制电路耦合在第一和第二节点之间。 该调节器电路被耦合以用充电电流对电容电路的电容进行充电。 耦合转换速率控制电路以在电路的上电模式期间控制电压在第一和第二节点之间的时间上的变化。 转换速率控制电路还包括开关和电阻器。 转换速率控制电路被耦合以响应于第一和第二节点之间的电压来切换开关。 电阻器两端的电压降限制在耦合在第一和第二节点之间的晶体管的基极 - 发射极电压降，以设置电压随时间的变化。

公开(公告)号：US20110298529A1

公开(公告)日：2011-12-08

申请号：US13136921

申请日：2011-08-15

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： H03K17/78

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

公开(公告)号：US08125265B2

公开(公告)日：2012-02-28

申请号：US13136921

申请日：2011-08-15

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

公开(公告)号：US07893754B1

公开(公告)日：2011-02-22

申请号：US12587204

申请日：2009-10-02

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

公开(公告)号：US20120146715A1

公开(公告)日：2012-06-14

申请号：US13398116

申请日：2012-02-16

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F3/02

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.

摘要翻译： 独立于温度的参考电路包括具有共同耦合的基极的第一和第二双极晶体管。 第一和第二电阻串联耦合在第二双极晶体管的发射极和地之间。 第一和第二电阻器分别具有第一和第二电阻值R1和R2，以及第三和第二温度系数TC3和TC2。 电阻值使得第一和第二双极晶体管的基极 - 发射极之间的电压TC1的温度系数基本上等于TC2×（R2 /（R1 + R2））+ TC3×（R1 /（ R1 + R2）），导致流经第一和第二双极晶体管中的每一个的参考电流在温度上基本恒定。 耦合在第二双极晶体管的节点和集电极之间的第三电阻器具有使得在节点处产生的参考电压在温度上基本恒定的值。

公开(公告)号：US20110121889A1

公开(公告)日：2011-05-26

申请号：US12931377

申请日：2011-01-31

申请人： David Kung ,  Leif Lund

发明人： David Kung ,  Leif Lund

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A temperature independent reference circuit includes first and second bipolar transistors with commonly coupled bases. First and second resistors are coupled in series between the emitter of the second bipolar transistor and ground. The first and second resistors have first and second resistance values, R1 and R2, and third and second temperature coefficients, TC3 and TC2, respectively. The resistance values being such that a temperature coefficient of a difference between the base-emitter voltages of the first and second bipolar transistors, TC1, is substantially equal to TC2×(R2/(R1+R2))+TC3×(R1/(R1+R2)), resulting in a reference current flowing through each of the first and second bipolar transistors that is substantially constant over temperature. A third resistor coupled between a node and the collector of the second bipolar transistor has a value such that a reference voltage generated at the node is substantially constant over temperature.