摘要:
An input circuit arrangement comprises an input, a comparator, and an evaluation circuit. The input is designed for coupling to a first terminal of an impedance and for feeding an input signal. The comparator is connected to the input of the input circuit arrangement and is designed for delivering an activation signal to an output as a function of a comparison of the input signal with an adjustable threshold. Furthermore, the evaluation circuit is connected to the input of the input circuit arrangement and for its activation to the output of the comparator and is designed for evaluating the value of the impedance that can be connected.
摘要:
A voltage converter is provided in which a first terminal (A) and a second terminal (B) are provided, each coupled to a switching means, the switching means is coupled to respective terminals for connecting a first capacitor (C1), a second capacitor (C2) and a third capacitor (C3), and the voltage converter is configured for being operated in first and second modes of operation each comprising at least three phases, and in which the three capacitors (C1, C2, C3) are inserted in series connection (S) between the first terminal (A) and a reference potential terminal (10) in one phase, and in each of the two other phases a first path and a second path (P1, P2) are provided in each case in parallel connection with at least one of the three capacitors (C1, C2, C3) related to the second terminal (B).
摘要:
A circuit arrangement for controlling at least one light source comprises a photodetector (2), a sampling circuit (6) for selectively sampling a photodetector signal (lin2) generated by the photodetector (2) as a function of a first and a second light source (10, 12), and a control unit (5), which is coupled on the input side to the sampling circuit (6). The circuit arrangement further comprises a first power-supply source (7), which is coupled to the control unit (5) and is designed for controlling at least one parameter of a first light source (12), and at least one second power-supply source (11), which is coupled to the control unit (5) and is designed for controlling at least one parameter of a second light source (12). The circuit arrangement is suitable, for example, for RGB lighting.
摘要:
A circuit arrangement (1) comprises a current source (10), a comparator (50) and a control device (90). The current source (10) serves for supplying a light-emitting diode (41). The comparator (50) may be coupled to the light-emitting diode (41) at a first input (51) via a push-button (101). The comparator (50) may be fed with a reference voltage (VREF) at a second terminal (52). The control device (90) selectively puts the current source (10) into a first operational state (A) for polling a push-button position of the push-button (101) or into a second operational state (B) for emitting radiation by means of the light-emitting diode (41).
摘要:
A voltage converter comprises a first, a second and a third capacitor (11, 12, 13) which are switched in series in at least one operating state, an input (1) for supplying an input voltage (VIN), an output (2) for providing an output voltage (VOUT), and a compensation circuit (5). The input (1) of the voltage converter is coupled to a capacitor from a group comprising the first, the second and the third capacitor (11, 12, 13). The output (2) of the voltage converter is coupled to a capacitor from the group comprising the first, the second and the third capacitor (11, 12, 13). The compensation circuit (5) is coupled to the first, the second and the third capacitor (11, 12, 13) and adapts a first voltage (V1) of the first capacitor (11), a second voltage (V2) of the second capacitor (12) and a third voltage (V3) of the third capacitor (13) to one another.
摘要:
A control circuit for control of light-emitting diodes has a first LED string (50) with at least one LED (51, 52, 53) and a first supply device (1) for supply of current to the first LED string (50). The supply device (1) has a control input (10) for delivery of a first control signal (CTL) and is provided for delivery, as desired, of a first supply current (IV1) or a second supply current (IV2) in dependence on the first control signal (CTL). The first and the second control currents (IV1, IV2) are non-zero.
摘要:
An apparatus includes a voltage converter for supplying voltage to an electrical load. The voltage converter is electrically connected at an output to a terminal of a series circuit. The voltage converter includes mechanisms for connecting the electrical load and a current sink. The voltage supplied by the voltage converter is dependent on an input voltage and on a present multiplication factor. The apparatus also includes a first comparator, a second comparator, and selection logic.
摘要:
A circuit arrangement (1) for driving an electrical load (13) comprises a first and a second terminal (2, 3) for feeding a first and a second control signal (S1, S2), a first output (23), to which an electrical load (13) can be coupled, a current source (9), which is coupled to the first output (23), and a control device (5). The control device is coupled to the first and the second terminal (2, 3) and comprises a programming circuit (6) and a trigger circuit (7), which are each coupled on the output side to a control input of the current source (9).
摘要:
In one embodiment, a DC converter has a frequency adjusting device with a frequency selection circuit, a frequency change-over switch (17), a frequency generator (18), a threshold signal generator (19), a state machine (20) and a unit (21) for providing a ready signal (S3). The frequency selection circuit has an output (15), at which a control signal (S5) is provided, which is set up to select a frequency of the switching frequency signal (DCLK) of the DC converter. The invention further relates to a method for selecting a frequency of the DC converter.
摘要:
The invention relates to a circuit arrangement (20) for a piezo transformer (22) comprising a driver circuit (23), to which the piezo transformer (22) can be connected, and a current sensor (21) for the determining an incoming power signal (IM), which is subject to an incoming current (IE) flowing through the piezo transformer (22). The invention further relates to the circuit arrangement (20) of a control unit (24) for providing a control signal (ST), which is subject the incoming power signal (IM); and an oscillator (25) having an oscillator output (43) for emitting an oscillator signal (SO) to a driver signal input (44) of the driver circuit (23) subject to the control signal (ST).