Abstract:
The invention relates to a circuit arrangement (10) with a circuit connection (11) for feeding a data signal (DATA) comprising digital information, a logic circuit (12) that is coupled to the circuit connection (11) at one input (22) for feeding the digital information, an activation circuit (13) and a voltage stabiliser (14) that is coupled to an output (18) of the activation circuit (13) in order to be activated. The activation circuit (13) comprises an input (16) that is coupled to the circuit connection (11), a delay element (17) that is coupled to the input (16) of the activation circuit (13) and an output (18) that is connected to the delay element (17) for emitting an activation signal (SON).
Abstract:
A circuit arrangement for controlling at least one light source comprises a photodetector (2), a sampling means (6) for optionally sampling a photodetector signal (Iin2) generated by the photodetector (2) depending on a first and second light source (10, 12), and a control unit (5), which is coupled to the sampling means (6) on the input side. The circuit arrangement further comprises a first supply source (7), which is coupled to the control unit (5) and is designed for controlling at least one parameter of a couplable first light source (12), and at least one second supply source (11), which is coupled to the control unit (5) and is designed for controlling at least one parameter of a couplable second light source (12). The circuit arrangement is suitable for example for an RGB illumination.
Abstract:
In one embodiment, a frequency selection circuit has a first input (11), to which a first threshold signal (S1) is supplied depending on a switching frequency signal (DCLK) of the DC converter, a second input (12), to which a second threshold signal (S2) is supplied depending on the first threshold signal (S1), a third input (13), to which a ready signal (S3) of the DC converter is supplied, and 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, wherein the control signal (S5) is provided depending on the first threshold signal (S1), the second threshold signal (S2) and the ready signal (S3). The invention further relates to a method for selecting a frequency of a DC converter.
Abstract:
A circuit arrangement for DC/DC converters in particular has an input (E) for connecting a power accumulator (L1) and a power source (BT) connected thereto, an output (A) for driving an electrical load (D1, D2), a load current path (3), which can be switched, a charge current path (4), which can be switched, and a measuring apparatus (M) for detecting a load current (IL), which flows through the load current path (3). Furthermore, a method for controlling a DC/DC converter is provided.
Abstract:
The invention relates to an arrangement comprising a voltage converter (1) for supplying voltage to an electrical load (2) by means of a current sink (3), first (4) and second (5) comparators and a selection logic (6). A voltage at the voltage converter (1) output depends on a multiplication factor. The selection logic (6) determines a new multiplication factor from the results of comparison of a current sink voltage with lower and top thresholds. A power use high efficiency is attainable, when the multiplication factor is adjusted in such a way that the current sink voltage is greater than the lower threshold and less than the top threshold, thereby the multiplication factor is increasable as much as necessary, but not further.
Abstract:
In one form of embodiment, a central unit especially for using in a network comprises a memory (2) having at least one light pattern (L) suitable for reproducing on a terminal unit (5), a control logic system (3) connected to the memory (2), and a communication interface coupled to the control logic system (3), for providing the at least one light pattern (L) for the terminal unit (5). In another form of embodiment, a terminal unit especially for using in a network comprises a sequence control unit (10), a communication interface (11) connected to the sequence control unit (10) and set up to download at least one light pattern (L) from the network, and a memory (12) coupled to the sequence control unit (10), for storing the at least one light pattern (L). In a further form of embodiment, a system for downloading a light pattern comprises a central unit (1), a terminal unit (5), and a communication device (7) for transmitting at least one light pattern (L) from a communication interface (4) of the central unit to a communication interface (11) of the terminal unit (5).
Abstract:
A circuit arrangement (10) for controlling an electrical load (2) comprises an input (11) for supplying a supply voltage (Vs) with an alternating component and an output (13) for providing an output signal (Sout) for controlling an electrical load (2) that can be coupled to it. The circuit arrangement (10) also comprises a frequency synthetizing circuit (20) for providing a reference frequency (f1) depending on the alternating component and a demodulator (60) with a first input (61) for supplying the reference frequency (f1), a second input (62), coupled to the input (11) of the circuit arrangement (10), and an output (63), coupled to the output (13) of the circuit arrangement (10).
Abstract:
A circuit arrangement for converting an alternating voltage (U-IN) into a rectified voltage (U-OUT) comprises a first transistor (40) whose first terminal (41) is coupled to an input terminal (1) of the circuit arrangement for supplying the alternating voltage (U-IN) and whose second terminal (42) is connected to an output terminal (5) of the circuit arrangement for outputting the rectified voltage (U-OUT). The circuit arrangement also comprises a control circuit (20) that, on the input side, is coupled to the first and the second terminal (41, 42) of the first transistor (40) and, on the output side, to a control terminal (43) of the first transistor (40) for supplying a first control signal (U-S1) to the first transistor (40). The control circuit is configured for setting the first control signal (U-S1) according to a first voltage on the first input (21) and to a second voltage on the second input (22).
Abstract:
The invention relates to a charge regulation assembly (30) and to a method for charging a battery (13). A DC/DC transformer (14) and an in-phase regulator (24) provide partial currents (I1, I2). A control unit (15) controls the DC/DC transformer (14) and the in-phase regulator (24) in accordance with the actual charge current (I) of the battery. The suggested concept reduces the power loss for a smaller chip surface, thus increasing the life cycle of the battery to be charged (13). The concept is particularly suitable, for example, for use in mobile radio devices.
Abstract:
Disclosed is a control system (1) for a voltage converter in order to convert a first constant voltage (UBAT) into a second constant voltage (U-G). Said control system (1) comprises a first input (3) designed to be coupled to a means for detecting a first current (I1) at a primary end of a transformer (11). The output end of the control system (1) is coupled to a control terminal of a transistor (16) which can be serially connected to the primary end of the transformer (11). The control system (1) further comprises an arithmetic unit (2) that is designed for setting the transistor (16) to a low amount of resistance during a switch-on period (T-ON) and to a great amount of resistance during a switch-off period (T-OFF). The inventive control system (1) also comprises a first comparator (42) for comparing a value of the first current (I1) or a value derived from the value of the first current (I1) to an adjustable setpoint value (SO1). The result of the comparison is fed to the arithmetic unit (2) in order to adjust the switch-off period (T-OFF).