Abstract:
Low-power, high-performance voltage regulator circuit devices are disclosed and described. In one embodiment, such a device can include a first stage circuitry configured to generate a high voltage reference from a low voltage reference, a second stage circuitry coupled to the first stage circuitry, the second stage circuitry configured to receive the high voltage reference and output a voltage regulated signal, and a switch disposed between and coupled to the first stage circuitry and the second stage circuitry, the switch being configured to couple and uncouple the first stage circuitry from the second stage circuitry.
Abstract:
The present disclosure provides a surgical instrument control circuit. The control circuit includes a primary processor, a safety processor in signal communication with the primary processor, the safety processor, and a segmented circuit. The segmented circuit includes a plurality of circuit segments in signal communication with the primary processor. The plurality of circuit segments is configured to control one or more operations of the surgical instrument. The safety processor is configured to monitor one or more parameters of the plurality of circuit segments.
Abstract:
A constant current circuit capable of operating on a low voltage. In a constant current circuit (200) for supplying a constant current to a circuit connected to a current output terminal (102) of the constant current circuit (200), a first transistor (M1) is disposed on a current path of the constant current. A second transistor (M2) is connected to the first transistor (M1) in such a manner that their gate terminals, which serve as the respective control terminals, are commonly connected. A first current/voltage converting part (14) converts the current flowing through the second transistor (M2) and through a third transistor (M3) to a voltage. A constant current source (10) generates a reference current. A second current/voltage converting part (16) converts the reference current to a voltage. A first error amplifier (12), to which the voltages of the first and second current/voltage converting parts (14,16) are inputted, adjusts the gate voltages of the first and second transistors (M1,M2). A voltage adjusting part (20) adjusts the voltage at the gate terminal of the third transistor (M3) such that the voltage (Vd2) at an end of the second transistor (M2) gets close to the predetermined reference voltage.
Abstract:
A method and an arrangement for controlling the output voltage (V2) of a DC-to-DC converter (100). The DC-to-DC converter (100) comprises converting means (101) and regulating means (102). The converting means is fed by a first DC-voltage (V1) from the regulating means. The first DC-voltage (V1) is determined by a feed back portion (VDIV) of the output voltage (V2) from the converting means and a reference voltage (VREF). The reference voltage is derived from a pulse train (PT1). The output voltage (V2) depends on both the first DC-voltage (V1) and the pulse train (PT1). The output voltage (V2) from the DC-to-DC converter is kept constant under varying load and the output voltage level can be adjusted in an easy and flexible manner by the pulse train.
Abstract:
A process for the electrical power supply of a magnetron which rapidly varies the electromagnetic power emitted and subtantially reduces its ripple. A magnetron (4) provided with coils (3) is positioned in series with a fast regulator (2), the assembly forming a load powered by a source (1). The fast regulator (2) supplies the magnetron either at constant current, or at constant absorbed or emitted power. A slow regulator (5) acts by means of the coils (3) on the magnetron (4) in order to limit the voltage present across the terminals of the fast regulator (2) and/or the energy dissipated by the latter. Application in particular for the power supply of magnetrons.
Abstract:
The present disclosure provides a surgical instrument control circuit. The control circuit includes a primary processor, a safety processor, and a segmented circuit. The segmented circuit includes a plurality of circuit segments in signal communication with the primary processor. The plurality of circuit segments includes a power segment configured to provide a segment voltage to the primary processor, the safety processor, and each of the plurality of circuit segments. The power segment is configured to provide variable voltage protection of each segment.
Abstract:
Methods and systems for modulating an amplifier power supply to efficiently attain amplified RF output power with much lower power dissipation than existing amplifiers.
Abstract:
Aspects of the present invention include a low-dropout (LDO) linear power supply system. The system includes a pass-element configured to generate an output voltage at an output based on an input voltage. The system also includes a compensation amplifier stage coupled to the output and configured to provide frequency compensation and provide a desired frequency response of the output voltage. The system further includes a gain amplifier stage interconnecting the compensation amplifier stage and the pass-element and configured to provide DC gain scaling to generate the output voltage substantially proportional to the input voltage within a given range of the input voltage.
Abstract:
A low drop-out (LDO) voltage regulator with a wide bandwidth power supply rejection ratio (PSRR) is described. In one aspect, the LDO voltage regulator includes two individual voltage regulator circuit stages. A first stage voltage regulator circuit output is at an intermediate voltage (VINT) between an input supply voltage (VDD) and a final regulated output voltage (VREG). A second stage voltage regulator circuit output is at the final regulated output voltage (VREG) and is optimized for noise-sensitive analog circuits across a wide operating bandwidth. The first stage voltage regulator circuit has a zero frequency while the second stage voltage regulator circuit has a matching pole frequency to minimize the AC response from VDD to VREG across all frequencies.
Abstract:
The invention concerns an electronic circuit for reducing the current consumption of a transformer (1). This circuit comprises a control circuit in the secondary circuit of the transformer (1) and a switch (2), controlled by the control circuit, in the primary circuit of the transformer (1) for separating the primary circuit of the transformer (1) from the power supply (3). The control circuit comprises a detector (6) for detecting the no-load state of the transformer (1). If the transformer (1) is in the no-load state, the switch (2) on the primary side is opened at least temporarily.