摘要:
An integrated amplifier circuit includes:first and second operational amplifiers each having a terminal connected to a supply potential node, and a terminal connected to a reference potential node;two ohmic voltage dividers each being formed of two resistors connected between an output of a respective one of the operational amplifiers and a first circuit node, and two further ohmic resistors each being connected between a respective tap of the voltage dividers and a respective inverting input of a respective one of the operational amplifiers, providing real negative feedback of the operational amplifiers;a third ohmic voltage divider formed of two resistors connected between a supply potential node and the first circuit node, an intermediate ohmic resistor connected between a tap of the third voltage divider and a second circuit node, and two ohmic supply resistors each being connected between the second circuit node and a respective non-inverting input of the operational amplifier; an ohmic series resistor connected to the inverting input of the first operational amplifier;terminals connected to outputs of the operational amplifiers, terminals connected to the supply and reference potential nodes for connection to a supply voltage source, terminals connected to the first and second circuit nodes, and a single fourth terminal connected to the series resistor and to the non-inverting input of the second operational amplifier for feeding in a signal.
摘要:
Integrable semiconductor circuit, including a negatively fed-back non-inverting operational amplifier, a first resistor connected between the signal output and the inverting input of the amplifier, a second resistor connected to the inverting input, first and second capacitors, the second capacitor being connected between the second resistor and reference potential, forming a voltage divider including the first and second resistors and the second capacitor connected between reference potential and the output of the amplifier with a first circuit point disposed between the second resistor and the second capacitor connecting the inverting input of the operational amplifier to reference potential, an operating potential source connected to one of the supply inputs of the amplifier and the other supply input being connected to reference potential together supplying the amplifier with a supply voltage, series-connected resistors having a second circuit point disposed therebetween, the resistors being connected between the operating potential source and the non-inverting input, a fifth resistor connected between the second circuit point and reference potential, and the first capacitor being connected in parallel with the fifth resistor, comprising an auxiliary d-c voltage source having a first pole connected to reference potential, first and second diodes each having an anode connected to the second pole of the d-c voltage source, one of the series-connected resistors being additionally connected between the cathode of the first diode and the non-inverting input of the amplifier, and the cathode of the second diode being connected to the first circuit point.
摘要:
A solid wood block idiophone having slit reinforcement plates mounted against the sides of the idiophone's wood block is described. Advantageously, the reinforcement plates act to increase the durability of the wood having one or more open faced resonant chambers with chamber sidewall slits by preventing the wood from fracturing to and from the open woodgrain ends terminated at the sidewall slits.
摘要:
A idiophone assembly for attachment to a rim or side of a drum comprising a idiophone, one or more quick release drum rim clamps and one or more fasteners and, as applicable, associated bosses for securing the clamps to the instrument is described. Advantageously, the assembly can be easily secured to the rim of a drum and easily removed from the drum as desired. In some variations, rubber insulating spacers are provided that at least partially acoustically isolate the instrument from the drum. The assembly is often positioned where it can be struck independently or in unison with the drum head to produce a rimshot or cross stick. A flexible drum stick is also described having two striking ends and a movable handle.
摘要:
Embodiments of the invention relate to drivers and methods for driving devices, comprising at least one functional unit at least one of which is adapted to deduce a device parameter of an electronic device from a terminal parameter of the electronic device.
摘要:
An embodiment of the invention relates to an apparatus including a power semiconductor device and a processor coupled thereto. The processor is configured to provide a control signal to the power semiconductor device to regulate an output characteristic of the apparatus. The processor models an internal characteristic of the power semiconductor device and alters the control signal if the modeled internal characteristic crosses a threshold value. In an exemplary embodiment, the internal characteristic is a channel temperature of a MOSFET. A sensor such as a thermistor is coupled to or included within the processor to sense a parameter separate from the power semiconductor device, such as a processor temperature, and the processor is configured to adapt the modeled internal characteristic to the sensed parameter.
摘要:
A power switch circuit for driving an airbag squib module has a power transistor, a pre-charge capacitance for storing a charge, a charging circuit and a controllable energy-coupling element. The power transistor has a first electrode, a second electrode and a control electrode. A path between the first electrode and the second electrode is connected in series with the airbag squib module between a supply potential and a reference potential. The charging circuit charges the pre-charge capacitance and the charging circuit is therefore coupled with the pre-charged capacitance. The controllable energy coupling element is connected between a first electrode of the pre-charge capacitance and the control electrode of the power transistor. The power switch exhibits a high degree of stability, allows a fast switching of the power transistor and further has an advantageous transient response.
摘要:
High-side switch arrangement having a switching transistor, the collector of which is connected to a battery connection of the high-side switch arrangement and the emitter of which is connected to an output connection of the high-side switch arrangement, an actuating transistor, the emitter of which is connected to the battery connection of the high-side switch arrangement and the collector of which is connected to the base of the switching transistor, and a diagnosis transistor, the emitter of which is connected to the battery connection of the high-side switch arrangement and the collector of which is connected to the output connection of the high-side switch arrangement, wherein the diagnosis transistor has a saturation collector for sensing the saturation current of the diagnosis transistor.
摘要:
An embodiment of the invention relates to an apparatus including a power semiconductor device and a processor coupled thereto. The processor is configured to provide a control signal to the power semiconductor device to regulate an output characteristic of the apparatus. The processor models an internal characteristic of the power semiconductor device and alters the control signal if the modeled internal characteristic crosses a threshold value. In an exemplary embodiment, the internal characteristic is a channel temperature of a MOSFET. A sensor such as a thermistor is coupled to or included within the processor to sense a parameter separate from the power semiconductor device, such as a processor temperature, and the processor is configured to adapt the modeled internal characteristic to the sensed parameter.
摘要:
A driver circuit driving at least a first light emitting diode. The driver circuit includes: a first bypass current source coupled in parallel to the first light emitting diode. The first bypass current source and the first light emitting diode form a first parallel circuit. A main current source is coupled in series with the first parallel circuit. A first regulator unit is configured to control a first bypass current of the first bypass current source.