Abstract: A driver circuit, operating method, and use of a current mirror of a driver circuit is provided that includes at least one output transistor, a reference network with at least one reference transistor, a switching device, which is connected to the control input of the output transistor and to the control input of the reference transistor to form a switchable current mirror, a current source for providing a reference current for a reference current path, whereby the current source and the reference transistor are arranged in the reference current path, a load terminal, whereby the load terminal and the output transistor are arranged in a load current path, and at least one damping network, which is connected to or connectable to the reference current path. Wherein a connection of components of the at least one damping network and a connection of components of the reference network are substantially the same.

Abstract: A circuit and method for operating a circuit with a terminal for connecting a photodiode to output an output current dependent on the photocurrent of the photodiode, with a resistance device for generating a voltage drop dependent on a photocurrent of the photodiode, with a control loop connected to the resistance device for generating the output current dependent on the photocurrent, with a switching means connected to the terminal with first switch positions for a first operating mode for operating the photodiode in the reversed bias and with second switch positions for a second operating mode for operating the photodiode in the photovoltaic mode, wherein in the first operating mode in the first switch positions of the switching means, the resistance device and the control loop are bridged and/or are not connected, and in the second operating mode in the second switch positions of the switching means, the terminal is connected to the resistance device.

Abstract: A laser drive circuit and use of digital-to-analog converters is provided, each with a current input and a current output to set current values of partial currents switchable by means of digital channel signals to provide a laser current pulse at least on the basis of a sum of partial currents, wherein at least one current output of one of the digital-to-analog converters is connected to at least one current input of an additional digital-to-analog converter via an analog switch.

Abstract: A circuit and method for operating a circuit with a terminal for connecting a photodiode to output an output current dependent on the photocurrent of the photodiode, with a resistance device for generating a voltage drop dependent on a photocurrent of the photodiode, with a control loop connected to the resistance device for generating the output current dependent on the photocurrent, with a switching means connected to the terminal with first switch positions for a first operating mode for operating the photodiode in the reversed bias and with second switch positions for a second operating mode for operating the photodiode in the photovoltaic mode, wherein in the first operating mode in the first switch positions of the switching means, the resistance device and the control loop are bridged and/or are not connected, and in the second operating mode in the second switch positions of the switching means, the terminal is connected to the resistance device.

Abstract: A driver circuit including an amplifier, which generates a control signal from a reference signal; a driver current mirror; and a control current switch located between the amplifier and the driver current mirror which selectably isolates the driver current mirror from the amplifier or connects the driver current mirror to the amplifier, wherein the driver current mirror, when in a state connected to the amplifier, amplifies the control signal into a driver signal. A compensating circuit is provided that generates a correction signal, as a function of an error current of the driver current mirror and provides the correction signal to an input of the amplifier, wherein a feedback signal input of the amplifier is fed through a feedback path from a feedback signal coupled out of a control branch of the driver current mirror, and the compensating circuit additively provides the correction signal at an input of the amplifier.

Abstract: A laser drive circuit and use of digital-to-analog converters is provided, each with a current input and a current output to set current values of partial currents switchable by means of digital channel signals to provide a laser current pulse at least on the basis of a sum of partial currents, wherein at least one current output of one of the digital-to-analog converters is connected to at least one current input of an additional digital-to-analog converter via an analog switch.

Abstract: A driver circuit, operating method, and use of a current mirror of a driver circuit is provided that includes at least one output transistor, a reference network with at least one reference transistor, a switching device, which is connected to the control input of the output transistor and to the control input of the reference transistor to form a switchable current mirror, a current source for providing a reference current for a reference current path, whereby the current source and the reference transistor are arranged in the reference current path, a load terminal, whereby the load terminal and the output transistor are arranged in a load current path, and at least one damping network, which is connected to or connectable to the reference current path. Wherein a connection of components of the at least one damping network and a connection of components of the reference network are substantially the same.

Abstract: A driver circuit and a method drive an electronic component such as a laser diode with a variable electric current that is controlledly switched between at least two discrete current levels. The driver circuit includes circuit elements that damp ringing or initial transient oscillations that arise when switching the current between the current levels. The driver circuit includes a current mirror having a mirror amplification factor dependent on the frequency of the variable electric current. In order to counteract parasitic capacitances and/or inductances leading to the ringing, an inductance and/or a resistance are connected between the two series circuits making up the current mirror, a capacitance is connected parallel to a reference resistor of one of the series circuits, and/or a capacitance is connected across the voltage supply.

Abstract: A driver circuit for electronic components is disclosed, the driver circuit including an amplifier, which generates a control signal from a reference signal; a driver current mirror; and a control current switch, which is located between the amplifier and the driver current mirror and which selectably isolates the driver current mirror from the amplifier or connects the driver current mirror to the amplifier, wherein the driver current mirror, when in a state connected to the amplifier, amplifies the control signal into a driver signal. A compensating circuit is also provided that generates a correction signal, as a function of an error current of the driver current mirror and provides the correction signal to an input of the amplifier, wherein a feedback signal input of the amplifier is fed through a feedback path from a feedback signal coupled out of a control branch of the driver current mirror, and the compensating circuit additively provides the correction signal at an input of the amplifier.

Abstract: The invention relates to an adhesive and binder for dermal or transdermal therapy systems, consisting of (a) a (meth)acrylate copolymer composed of radically polymerized C1 to C4 alkyl esters of acrylic or methacrylic acid and (meth)acrylate monomers with a cationic ammonium group in the alkyl radical, containing (b) 0.1-45 wt.-% with reference to (a) of an organic dicarboxylic or tricarboxylic acid or an acrylate or (meth)acrylate polymer or copolymer containing an acid group, as well as (c) 20-80 wt.-% with reference to (a) of a plasticizer, and (d) if necessary, a pharmaceutically active substance and/or pharmaceutically usual additives, characterized in that dibutyl sebacate is contained as the plasticizer.

Abstract: A driver circuit and a method drive an electronic component such as a laser diode with a variable electric current that is controlledly switched between at least two discrete current levels. The driver circuit includes circuit elements that damp ringing or initial transient oscillations that arise when switching the current between the current levels. The driver circuit includes a current mirror having a mirror amplification factor dependent on the frequency of the variable electric current. In order to counteract parasitic capacitances and/or inductances leading to the ringing, an inductance and/or a resistance are connected between the two series circuits making up the current mirror, a capacitance is connected parallel to a reference resistor of one of the series circuits, and/or a capacitance is connected across the voltage supply.

Abstract: In the previously known methods for tuning the PLL circuit, the loop filter has to be discharged again if the PLL circuit does not lock in. During this time, also known as dead time, the PLL circuit cannot detect any signals. With the new method, the PLL circuit can also detect signals during the discharge period of the loop filter. This avoids dead times and the signal detection by the PLL circuit is substantially accelerated. The data throughput is increased, especially when used in high-frequency applications such as, for example, in the field of mobile telephones.