首页>
外国专利>
Circuit arrangment for the temperature-dependent regulation of a load current
Circuit arrangment for the temperature-dependent regulation of a load current
展开▼
机译：用于根据温度调节负载电流的电路装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention concerns a circuit arrangement (2) for the regulation of a current (IL) through a load (RL), with: a resistance (RS), through which a load current (IL) flows and across which a voltage (VS) drops, which serves as a control variable for the regulation of the load current (IL), a tapping point (P) for a reference voltage (Vref), which serves as a command variable for the regulation of the load current (IL), and a differential amplifier for the amplification of the control deviation (Vref−VS). The differential amplifier has a first and a second transistor (Q1, Q2) for the regulation of the load current (IL) as a function of the temperature, and the circuit arrangement (2) is designed for the operation of the two transistors (Q1, Q2) at the same collector-emitter voltage (UCE1, UCE2) and at a constant ratio of the collector quiescent currents (IC1, IC2) being different from one, such that the circuit arrangement (2), controlled by temperature voltage as determined by the physics of semiconductors, regulates the load current (IL) as a function of the temperature in a defined manner. The invention concerns moreover a motor vehicle fan with such a circuit arrangement (2) and an associated method.
展开▼
机译：本发明涉及一种用于调节通过负载（R L ）的电流（I L ）的电路装置（ 2 ），其中：电阻（R S ），负载电流（I L ）流经该电阻（R S ）下降，用作控制负载电流（I L ）的控制变量，参考电压（V ref ）的分接点（P），用作用于调节负载电流的命令变量（I L ），以及用于放大控制偏差的差分放大器（V ref -V S ）。差分放大器具有第一和第二晶体管（Q 1 ，Q 2 ），用于将负载电流（I L ）调节为温度的函数，电路布置（ 2 ）设计用于两个晶体管（Q 1 ，Q 2 ）的操作在相同的集电极-发射极电压（U CE1 ，U CE2 ）和恒定的集电极静态电流（I C1 ，I C2 ）与之不同，因此受半导体物理特性决定的受温度电压控制的电路布置（ 2 ）调节负载电流（I L ）随温度的变化而变化。此外，本发明涉及一种具有这种电路装置（ 2 ）的机动车风扇及其相关方法。
展开▼
