摘要:
A voltage regulator having a current mirror for decoupling a partial current icluding a first NMOS transistor as a series transistor. In addition, the voltage regulator has a second NMOS transistor, which forms a current mirror with the first NMOS transistor. Furthermore, in the case of the voltage regulator, the first NMOS transistor is connected in series with a first PMOS transistor and a third transistor. The second NMOS transistor is likewise connected in series with a second PMOS transistor and a fourth transistor, the control inputs of the first and second PMOS transistors being connected to one another and the control inputs of the third and fourth transistors being connected to a control terminal for setting the magnitude of the partial current to be decoupled.
摘要:
A circuit for sensing a physical quantity according to an embodiment of the present invention includes a first oscillator circuit configured to provide a first clock signal including a first frequency depending on the physical quantity, and a second oscillator circuit configured to provide a second clock signal comprising a second frequency depending on the physical quantity. The circuit also includes a frequency comparator circuit configured to provide a frequency signal indicative of the physical quantity, the frequency signal being based on the first and second frequencies, wherein the first and second oscillator circuits are configured to provide the first and second clock signals such that due to a change in the physical quantity one frequency of the first and second frequencies increases, while the other frequency of the first and second frequencies decreases.
摘要:
A bandgap circuit, a starter circuit, and a monitoring circuit for a bandgap circuit including a bandgap reference circuit having a first branch and a second branch, the first branch having a first node, the second branch having a second node, such that a potential at the first node is equal to a potential at the second node in an equilibrium of the bandgap reference circuit. The bandgap reference circuit further having a feedback node for a feedback signal and a feedback circuit coupled to the first and second nodes and adapted to provide a feedback signal to the feedback node based upon a comparison of the potentials at the first and second nodes.
摘要:
A circuit for detecting, whether a voltage difference is below a desired voltage difference comprises a voltage shift resistor, a current provider and a detection circuit. The current provider provides a current flowing through the voltage shift resistor such that the desired voltage difference across the voltage shift resistor is determined by a reference signal. The detection circuit is configured to compare a first voltage at a first input with a voltage at a second input to obtain a signal. The voltage shift resistor is coupled between a conductor for a second voltage and the second input, such that the voltage at the second input differs from the second voltage by the desired voltage difference, and wherein the detection circuit is configured to provide the signal, such that the signal indicates, whether the voltage difference between the first and the second voltage is below the desired voltage difference.
摘要:
A frequency regulator for varying a clock frequency of a power-supplied consumer operated in a clocked manner, wherein the frequency regulator is implemented to perform an overall variation of the clock frequency from an actual frequency to a set frequency, such that the overall variation is obtained by a plurality of clock changes, each with a different amount of change, wherein each of the respective amounts of change depends on a power change caused by the associated clock frequency change.
摘要:
A circuit arrangement for voltage regulation having a series regulator with a regulating amplifier and a charge pump that is connected downstream of the regulating amplifier, a reference voltage unit that generates a reference voltage for the regulating amplifier, and a starter unit that generates a starter voltage in order to supply the regulating amplifier, the charge pump, and the reference voltage unit with voltage while the series regulator is being started.
摘要:
A voltage regulator having a current mirror for decoupling a partial current icluding a first NMOS transistor as a series transistor. In addition, the voltage regulator has a second NMOS transistor, which forms a current mirror with the first NMOS transistor. Furthermore, in the case of the voltage regulator, the first NMOS transistor is connected in series with a first PMOS transistor and a third transistor. The second NMOS transistor is likewise connected in series with a second PMOS transistor and a fourth transistor, the control inputs of the first and second PMOS transistors being connected to one another and the control inputs of the third and fourth transistors being connected to a control terminal for setting the magnitude of the partial current to be decoupled.
摘要:
A circuit arrangement having a voltage regulator, which is designed to generate a regulated operating voltage, and a voltage monitoring unit, which is designed to monitor the regulated operating voltage for deviations from desired values. The voltage monitoring unit has a first detector, which is designed to cause an alarm signal to be generated when the first detector detects that the regulated operating voltage is outside a first voltage interval, and a second detector, which is designed to cause an initiator to initiate countermeasures which influence the regulated operating voltage when the second detector detects that the regulated operating voltage is outside a second voltage interval, which is inside the first voltage interval.
摘要:
A voltage monitoring arrangement including a number of comparison devices, which corresponds to a prescribed number of voltage ranges, compares the value of an input voltage with a reference voltage and outputs a prescribed signal if the input voltage is within one of the prescribed voltage ranges. The voltage monitoring arrangement has a latch circuit which, when a latch signal is applied, establishes which voltage range the input voltage is currently in when the latch signal is applied, resulting in the arrangement having automatic voltage range reduction. The voltage monitoring arrangement has a monitoring unit which outputs a predetermined signal if the input voltage is outside the voltage range which exists when the latch signal is applied.
摘要:
The circuit contains a series regulator with an FET. A capacitor and a further FET, which is provided as a transfer gate and is driven by the POR signal, are connected in series between the source terminal, to which the external supply voltage is applied, and the gate connection. When the external voltage is applied, the FET opens, with the transfer gate switched on, corresponding to the charging of the capacitor which now takes place. Because this charging process takes a certain amount of time, overshoots in the internal voltage are prevented.