摘要:
A power electronic unit for an amplifier of an imaging magnetic resonance tomography (MRT) system is provided. The power electronic unit includes at least one printed circuit board, on which a plurality of transistors are arranged. Ports (e.g., drain and source) of the plurality of transistors are connected together by electrically conductive connections, and the plurality of transistors are all arranged on one side of the at least one printed circuit board. An output line or cable parallel to the connections, at least in sections, runs on the opposing side of the printed circuit board and may be connected or is connected with or without further interconnected elements (e.g., a balun) to transmitting coils of the MRT.
摘要:
An apparatus for cooling an electrical component includes a circuit board with the electrical component disposed on the circuit board. The apparatus includes a cover disposed on the circuit board. The cover and the circuit board form a closed cavity in which the electronic component is disposed. The cavity has a first opening for introduction of a fluid and a second opening for discharge of a fluid.
摘要:
A device for power measurement for the purposes of plausibility checking and/or calibration of a primary power measurement device on a power amplifier of a magnetic resonance device is provided. The device includes a circulator arranged between an output of the power amplifier and a switching device for connection of the power amplifier to a transmit antenna. A first input of the circulator is connected to the output of the power amplifier, a second input of the circulator is connected to the switching device, and a third input of the circulator is connected to a secondary power measurement device configured for measurement of a signal reflected on the open switching device or the transmit antenna.
摘要:
A power amplifier device for a magnetic resonance device includes a circuit board with at least one power amplifier module, and at least one electronics structure including coupled conductor paths arranged on opposing sides of the circuit board. The power amplifier device also includes a cooling plate operable for cooling components on the circuit board that heat up during operation and abutting the circuit board on one side. The cooling plate has a depression that follows the course of the conductor path and faces the conductor path in the region of the conductor path of the electronics structure that is arranged on the side of the circuit board facing the cooling plate.
摘要:
A power amplifier unit for a magnetic resonance device includes at least two power amplifier modules. Symmetrical output signals from the at least two power amplifier modules are fed to a shared balun. The shared balun is provided on a printed circuit board (PCB) and is realized in a unit with the at least two power amplifier modules. The balun is configured to asymmetrize a sum signal.
摘要:
A method for supplying a plurality of system components of a system with a common reference signal is described, in which an electrical output reference signal is created by a reference signal generator and a number of optical reference signals are generated using the electrical output reference signal. The optical reference signals are transmitted to the individual system components, and an electrical input reference signal for the corresponding system component is generated at or in the system component using the transferred optical reference signal. A corresponding reference signaling arrangement, a reference signal transmission facility, an electro-technical system having a number of system components and a system component for the system are also provided.
摘要:
A power electronics assembly for a magnetic resonance device includes a housing and at least one printed circuit board (PCB) arranged in the housing with at least one power electronics component to be cooled. The PCB has an at least one millimeter thick backside layer that may be made of copper. The power electronics assembly also includes a stabilizing cooling plate configured as part of the housing and/or the housing includes at least one coolant channel open on at least one side, so that the PCB mounted on the cooling plate comes into direct contact with coolant guided in the coolant channel in an area of the power electronics components with the backside layer.
摘要:
A power amplifier unit for a magnetic resonance device includes at least two power amplifier modules. Symmetrical output signals from the at least two power amplifier modules are fed to a shared balun. The shared balun is provided on a printed circuit board (PCB) and is realized in a unit with the at least two power amplifier modules. The balun is configured to asymmetrize a sum signal.
摘要:
An amplifier device has an amplifier circuit, an energy supply device, a switching matrix and a control device. A radio-frequency, low-energy signal pulse can be amplified into a high-energy power pulse by the amplifier circuit. The amplifier circuit is supplied with electrical energy by the energy supply device. The energy supply device has a number of electrical energy sources that are separated in terms of potential relative to one another in a state in which they are not connected to the amplifier circuit. The electrical energy sources can be selectively connected to the amplifier circuit by the switching matrix. The switching state of the switching matrix can be dynamically set for this purpose by the control device.
摘要:
A circuit arrangement including a plurality of amplifier stages to amplify an electrical RF signal for a magnetic resonance tomography device is provided. The plurality of amplifier stages is arranged on at least one circuit board. A circuit board of the at least one circuit board surrounds a cooling pipe.