137 results about "Isolation amplifier" patented technology

Ultrasound bulk wave transducers and bulk wave transducer arrays for wide band or multi frequency band operation, in which the bulk wave is radiated from a front surface and the transducer is mounted on a backing material with sufficiently high absorption that reflected waves in the backing material can be neglected. The transducer is formed of layers that include a high impedance section comprised of at least one piezoelectric layer covered with electrodes to form an electric port, and at least one additional elastic layer, with all of the layers of the high impedance section having substantially the same characteristic impedance to yield negligible reflection between the layers. The transducer further includes a load matching section comprised of a set of elastic layers for impedance matching between the high impedance section and the load material and, optionally, impedance matching layers between the high impedance section and the backing material for shaping the transducer frequency response. For multiband operation, the high impedance section includes multiple piezoelectric layers covered with electrodes to form multiple electric ports that can further be combined by electric parallel, anti-parallel, serial, or anti-serial galvanic coupling to form electric ports with selected frequency transfer functions. Each electric port may be connected to separate electronic transceiver systems to obtain, through selection of drive signals on individual ports, selectable electric parallel, anti-parallel, serial, or anti-serial coupling of the ports in transmit mode, enabling transmission of ultrasound pulses with multi-band frequency components. In receive mode, signals from the individual electric ports can be combined after isolation amplifiers in a filter-combination unit to obtain composite electric ports with extreme wide-band transfer functions and multi-band transfer functions covering a range from a 1st to a 4th harmonic band.

An electronic processing system contains a power supply subsystem and a multi-processor module. Programmable control circuitry manages power consumption in the electronic system by allocating priority among a plurality of competing demands, such as total power consumption, power consumption at any one of the processors, and thermal measurements. Analog sense measurements of incoming power are transmitted to the control circuits, which are protected from noise through use of an isolation barrier established by a linear isolation amplifier.

The present invention is directed to a highly-integrated MEMS-based miniaturized transceiver. The transceiver utilizes a low band front-end to direct sample low band signals and a high band front-end to translate high band signals that cannot be directly sampled to low band before low band front-end processing. The low band front-end comprises an array of High-Q MEMS (microelectromechanical systems)-based filters / resonators separated by isolation amplifiers in selectable cascade with narrower bandwidth filters. Dynamic tuning ability is provided through the isolation amplifiers and the sample frequency of the analog-to-digital converter. This architecture is amenable to monolithic fabrication. The input frequency range is scalable with analog-to-digital conversion sampling rate improvements. Re-utilization of filters is spatially efficient and cost effective. Tuning time is limited only by the analog-to-digital conversion and digital signal processing, not synthesizer settling times. This architecture eliminates major sources of traditional intermodulation distortion and reduces complex hardware, increasing reliability.

The invention provides a digital amplitude-integrated cerebral function monitor (CFM). The CFM comprises a signal acquisition system, a signal amplification system and a signal processing system, and signals are acquired by the signal acquisition system, amplified by the signal amplification system and further processed by the signal processing system, thereby obtaining an amplitude-integrated electroencephalogram (aEEG), wherein, the signal acquisition system is a single-lead or double-lead system; the signal amplification system comprises an isolation amplifier and a main amplifier; and the signal processing system comprises a CFM filter module, an amplitude-squeezing module and a peak detecting and smoothing module. The digital amplitude-integrated CFM provided by the invention has the advantages of low environmental requirements and high anti-interference and anti-drifting performance, and can achieve the continuous bedside detection on a real-time basis for a long time and reflect the changes in the cerebral function of patients on a timely basis.

This invention relates to router linear isolation circuit device, which comprises transducer, photoelectricity isolation amplifier and signal combination device and one abstract frequency and one time parameter adjust circuit, wherein, the abstract frequency device is composed of low band filter and high band filter and one abstract device; the input signal is connected to low band filter or high band filter input end and first input end of abstract device; the low band and high band filter output end is connected to other end of abstract device.

The invention discloses a multi-functional, high-power, multi-channel, rolling and fast measurement electrical method earthquake comprehensive measuring system used in geological exploration. The system comprises a computer, a system on programmable chip (SoPC) control circuit, a high-voltage power supply, a high-voltage power supply bridge, a current sampling and separation amplifier, a channel input / high voltage output control circuit, a cable, electrodes, a radio-detector, a preamplifier, a filter, an analog to digital (AD) converter and a data storage. The system has the characteristic of multiple functions, and can be used for time-domain electrical exploration, frequency-domain electrical exploration and seismic exploration; when the system is used for measuring electrical signals, the transmitted power can be more than ten kilowatts, so the system has the characteristic of high power; the system can realize multi-channel measurement and rolling measurement so as to greatly improve the working efficiency; and the data in multiple channels are acquired at the same time, and the data sampling speed is up to ten microseconds, so the time precision is improved.

The invention discloses a rapid heat-treatment temperature measuring and controlling system and a measuring and controlling method. The system comprises an infrared pyrometer, a standard K-shaped thermoelectric couple silicon wafer, a temperature signal processor, a thermoelectric couple thermodetector, a heating power regulator, an alternating current zero crossing detector, a timing counter, a controllable silicon control signal isolation amplifier, a controllable silicon heating source, a heating light set and a control computer. The connection relationships of the assemblies are shown as an attached drawing 1 and the whole system is uniformly coordinated by the control computer for controlling, wherein the heating power regulator is internally set in the program of the computer. The temperature measuring and controlling method comprises the steps of measuring and calibrating the temperature by using the standard thermoelectric couple, measuring the temperature by using the infrared pyrometer, controlling the adjustment of the heating power of light by using the timing counter, dividedly controlling the heating light, adjusting the distribution uniformity of the temperature and the like. The invention can carry out self-adaptive PID adjustment on the temperature, has rapid adjustment and controlling reaction and can fully-automatically achieve the rapid temperature measuring and controlling functions.

A voltage sampling circuit applicable to a dual-power automatic transfer switch comprises a surge suppression and voltage detection circuit, an isolation amplification circuit and a level conversion and signal amplification circuit. An input end of the detection circuit is connected with a phase line and a neutral line for sampling voltage, and an output end of the detection circuit is connected with the isolation amplification circuit and used for suppressing interference signals coupled to a sampling voltage port and converting alternating current power frequency signals into first current signals I1 for output. An output end of the isolation amplifier circuit is connected with the level conversion and signal amplification circuit and is used for isolating and amplifying the first current signals I1 into second current signals I2 for output and improving interference resistance of the sampling circuit. The level conversion and signal amplification circuit 16 is used for converting the second current signals I2 into sampling voltage signals U2 which can be received by a microprocessing unit. The controller for the dual-power automatic transfer switch employs the voltage sampling circuit to achieve precision detection low in temperature influence for common and standby power supplies high in interference resistance, and comprehensive detection of voltage loss, undervoltage, overvoltage and three-phase unbalance.

The invention relates to an online test system for mobile dynamic mist distribution performance, and belongs to the technical field of sprayer test equipment. The system comprises a group of mist distribution acquisition devices; the bottoms of the mist distribution acquisition devices are respectively provided with a weight sensor; the output end of the weight sensor is connected with the input end of an acquisition card; an automatic rewinding reel is arranged on a mobile device; the acquisition card is in communication connection with a portable computer through a data wire; the portable computer is connected with a dynamic control circuit; a 485 communication module of the dynamic control circuit is connected with a corresponding port of a mater chip; and the control output end of the master chip is respectively connected with a motor controlled end and a pressure-regulating valve of a nozzle water supply pump through an isolation amplifier circuit. The online test system tests nozzles on line, and also tests the dynamic spray performance of various nozzles when the flow rate and the water supply pressure are changed so as to comprehensively understand and evaluate the performance of the tested nozzles.

The invention provides a DC protective measurement and control system which has characteristics in including six parts: a DC voltage-dividing unit, an isolation amplifier unit, a protective measurement and control unit, a communication management unit, a center processing unit installed with a maintenance analyse software and a communication medium. The system has advantages in that: 1) the system has better reliability, security, rapidity, sensitivity, easy maintenance and noise immunity; 2) sampling precision is up to 76uv / 1LSB, dynamic input range is 0-250mv, and the system has zero drift and gain automatic processing functions assort with hardware and software, ensures sampling data veracity of city rail transit power supply line under various load conditions; 3) the system can ensure high precision collecting and reliable transfering of power supply feeder current voltage amount, and has safe isolation distance with high-voltage line and micro-computer delay protective device; 4) the system has reliable protection and measurement control functions, realizes integration of protection, measurement and control; 5) crate has good full stopping property, and has high protection grade and strong noise immunity.

The invention belongs to a measurement device of a nuclear reactor and in particular relates to a device for measuring the reactivity of a nuclear reactor and monitoring the critical state of the nuclear reactor. The device is composed of a data processor and a signal conditioner; an isolation amplifier is arranged in the signal conditioner; and the input end of the isolation amplifier is provided with a P2 signal input port. The device not only has the function of measuring the reactivity but also has the critical monitoring and critical extrapolation functions, and can automatically measure the reactivity of the reactor and perform the offline processing on the measurement result; and when the critical extrapolation and the critical monitoring are conducted, the selection of extrapolation sub-function items and the selection of extrapolation data intervals can be carried out via a human-machine interface, diversified display and record can be carried out on the result. The reactivity instrument has the advantages of high automation degree, rapid measurement speed, high measurement accuracy and simplicity and convenience in operation, thereby greatly improving the functionality and use ratio of the device and achieving the full coverage of the full-function application field before the nuclear reactor is in a critical state.

The invention discloses a system and a method for time delay calibration of a Beidou navigation signal hardware simulator. The system comprises a satellite navigation signal simulator, a signal acquisition module, an isolation amplifier and a signal processing module, wherein the isolation amplifier outputs a first clock signal and a second clock signal; the satellite navigation signal simulator takes the first clock signal as a work clock and outputs a radio frequency analog signal and a pulse per second signal; the signal acquisition module takes the second clock signal as a sampling clock and is used for acquiring the radio frequency GEO (geosynchronous) satellite analog signal and the pulse per second signal; and the signal processing module calculates delay inequality between an initial code phase of the radio frequency GEO satellite analog signal and a pulse per second rising edge of the pulse per second signal based on the acquired radio frequency analog signal and the pulse per second signal to obtain the time delay of the simulator. With the adoption of the technical scheme, a special zero-pseudorange or fixed-pseudorange testing scene is not required to be set in the simulator, and the time delay of the simulator can be calibrated when the simulator simulates output normally.

The invention discloses a voltage itinerant measurement circuit of a low-power methanol fuel cell. Generally, a fuel cell stack consists of a plurality of single cells; and because each single cell of the fuel cell stack needs real-time accurate measurement, high-speed itinerant sampling for each single cell is finished by adopting cooperation of an analog multi-way switch and a small signal operational amplifier. Isolation measurement finished by adopting an isolation amplifier is isolation control of the analog multi-way switch finished by a controller through a photoelectric coupler. The voltage itinerant measurement circuit avoids the problems of breakdown of the whole stack caused by the death of the single cell and the like in time by itinerantly monitoring the working voltage of each single cell of the fuel cell stack and designing fault alarm, and is compact and practical.

The invention relates to a superconductive strip material alternative current loss tester and a method. The tester comprises a gradient amplifier, a hall current sensor, an isolation amplifier, an industry control computer, a phase-locked amplifier, an object sample and a protective resistance. The method comprises: using the computer to control the OSC of the phase-locked amplifier to output a sine signal of a certain frequency f and a certain amplitude, transmitting the signal via the first-stage isolation amplifier to reach the gradient amplifier, controlling the gradient amplifier to generate a current signal Irms of a same frequency f, generating a loss voltage Vrms on the sample; using the phase-locked amplifier to measure the loss voltage Vrms and the phase phi U; using the hall current sensor and the phase-locked amplifier to measure the phase phi I of the current signal Irms; using the hall current sensor and a data acquisition card to collect the volume Irms of the current signal; and using equations to calculate the alternative current transmission loss of the superconductive strip material. The invention has high automatic degrees, high efficiency, high speed and high test accuracy.

The invention discloses a GNSS signal simulator time delay calibration system and a GNSS signal simulator time delay calibration method. The GNSS signal simulator time delay calibration system comprises an isolation amplifier, a satellite navigation signal simulator, a data acquisition module, and a signal processing module. The isolation amplifier is used to divide an external clock signal into a first clock signal and a second clock signal. The satellite navigation signal simulator adopts the first clock signal as the working clock, and is used to output a radio frequency navigation signal and a second pulse signal in a normal simulation scene that the receiving device is in the static state, and the simulator pseudo-range is time-varying. The data acquisition module adopts the second clock signal as the sampling clock, and is used to acquire the radio frequency navigation signal and the second pulse signal. The signal processing module is used to calculate the pseudo-range corresponding to the radio frequency navigation signal and the pseudo-range recorded by the simulation epoch moment simulator disposed on the rising edge of the second pulse signal based on the acquired radio frequency navigation signal and the acquired second pulse signal, and then the own time delay of the satellite navigation signal simulator can be acquired. By adopting the technical scheme, the special scene of the zero pseudo-range or the fixed pseudo-range is not required, and the calibration of the simulator time delay can be realized under the condition of the simulator normal simulation scene signal output.

The invention discloses a stepped frequency signal generation method based on the frequency selective output of initialize switches of phase-locked loops, which is characterized in that a phase-locking circuit comprising the phase-locked loops, an isolation amplifier, a single-pole double-throw high-velocity electronic switch, a pulse modulator and a large-scale programmable device generates a stepped frequency signal; the phase-locked loops realize the bandwidth and the frequency hopping interval of the stepped frequency signal of a radar; the isolation amplifier isolates the influence of the standing waves generated by the switching of the single-pole double-throw high-velocity electronic switch on locking phases of the phase-locked loops; the single-pole double-throw high-velocity electronic switch switches by taking a pulse modulation periodic signal as a trigger between the two phase-locked loops; the pulse modulator realizes pulse modulation by taking the pulse modulation periodic signal as a control signal; and the large-scale programmable device outputs corresponding control orders to the phase-locked loops by taking the pulse modulation periodic signal as a beat and carries out alternated frequency initialization on the two phase-locked loops to realize stepped frequency. The invention has minimum volume and weight in the traditional stepped frequency signal generation scheme when sufficiently meeting the requirements for frequency bandwidths and frequency intervals.

The invention discloses an analog quantity conditioning and distributing device with high precision and all-digital calibration, which comprises an instrumentation amplifier, an isolation amplifier, a verification module and an output drive module, wherein the instrumentation amplifier is used for receiving and treating field signals; the isolation amplifier is used for receiving the field signals processed by the instrumentation amplifier and then performing isolation output on the field signals; the verification module is used for receiving and verifying the signals output by the isolation amplifier; the output drive module is used for receiving the signals from the verification module and outputting the signals to a corresponding system; the verification module is connected with a general calibration device which is used for verifying the field signals output by the verification module; the general calibration device comprises an upper computer controlling the verification process and a calibration instrument controlled by the upper computer to generate standard voltage and current signals and transferring the standard voltage and current signals to the verification module; the upper computer is connected with the verification module through an SPI (serial peripheral interface); and the output drive module is connected with the calibration instrument. According to the invention, a digital potentiometer is adopted to replace a mechanical potentiometer, and the digital potentiometer is operated to change value of resistance through the SPI, so that detuning and linear error of the analog quantity conditioning and distributing device can be eliminated.

The invention discloses an intelligent transformer substation grounding network anti-corrosion and monitoring system, which is composed of a constant potential rectifier, a corrosion on-line detectionsensor, a temperature and humidity sensor, an isolation amplifier, an analog-to-digital converter, a single chip device, an upper computer, a 3G data and image transmission unit, a remote detection client and the like; the signals transmitted by the constant potential rectifier, the corrosion on-line detection sensor and the temperature and humidity sensor are isolated and amplified by the isolation amplifier, enters into the analog-to-digital converter for A / D conversion, the result is converted and transmitted to the single chip to be transmitted to the upper computer, the 3G data and imagetransmission unit, and the remote detection client. The system can achieve the aims of effectively mitigating corrosion on the grounding network, prolonging service life of the grounding network andremote monitoring in real time.

The invention discloses an universal controller of a spaceflight carrier rocket, comprising a control plate, a time sequence plate and an attitude control plate, wherein the time sequence plate comprises M paths of ignition units; the attitude control plate comprises N paths of attitude control drive modules, N paths of attitude control recovery modules, pressure collection modules and remote -measuring power distribution and interruption modules; the control plate comprises a processor DSP (Digital Signal Processor), a programmable logic controller CPLD (Complex Programmable Logic Device), an isolated power supply, an analogue switch, an isolation amplifier, M paths of time sequence recovery modules, M paths of ignition recovery modules, P paths of indication input modules, M paths of time sequence drive modules, a rudder control output module, a rocket-borne CAN isolation drive module, and a ground CAN isolation drive module. The controller is characterized in that controllers in four cabins are combined into one universal controller and has the advantages of modular design, good universality and strong compatibility.

The invention discloses a high-power microwave active protection device. The high-power microwave active protection device comprises a klystron. The output end of the klystron is connected with double directional couplers, and the double directional couplers are sequentially connected with a DC block, a wave detector, an isolation amplifier, a high reflection protection box and a fast protection box. The high reflection protection box is further connected with a microwave source, the fast protection box is respectively connected two digital isolators, and the two digital isolators are connected with a PLC and a high voltage source respectively. According to the protection method of the high-power microwave active protection device, by judging the magnitude of reflection power, signals of the microwave source are cut off timely before ignition, and thus ignition is avoided; meanwhile, a protection measure for faults of a circulator is provided for the microwave devices such as the klystron strict in the reflection power; system reliability is improved, the klystron is protected to be safe, and heavy economical losses are avoided.

The invention discloses a precision voltage sampling circuit and a sampling method. The circuit comprises a voltage input end, a voltage division circuit, an isolation operational amplification circuit, a differential amplification circuit and a voltage output end. The voltage input end is electrically connected with the input end of the voltage division circuit, the negative electrode of the voltage division circuit is electrically connected with the analog ground, the isolation operational amplifier circuit comprises an isolation amplifier, an input end power supply and an output end power supply, and the input end of the isolation amplifier is connected with the voltage division circuit; the isolation amplifier is introduced, so that the sampling circuit has a good input and output ohmic isolation characteristic, the anti-interference capability is enhanced, and signals can be transmitted with high impedance and high common-mode rejection capability in a noise environment; by adopting the differential amplification circuit, the amplification capability of a differential mode signal and the inhibition capability of a common mode signal are improved, the common mode rejection ratio is effectively improved, the temperature drift can be better inhibited, and different voltage division modes are adopted according to the range of the voltage to realize the segmented sampling of the input voltage.

The invention discloses a digital converter conversion program of a synchro / rotary transformer. A voltage signal outputted by a synchro / rotary transformer digital converter is isolated and amplified through an isolation amplifier, and is simultaneously sampled by an A / D converters; after the A / D converter completes analog to digital conversion, the microcontroller reads three digital signals outputted by the A / D converter; and through multiplication and division, a look-up table, summation and other operations, a digital angle is outputted. The program of the invention uses software to realize various functions, and has the advantages of simple circuit, high precision, low power consumption, high reliability and low cost.

The invention discloses an isolation amplifier with high linearity. The isolation amplifier comprises an input amplifier circuit A, an operational amplifier B, a modulator C, a demodulator D and a transformer T1. An input signal Vin is connected with an input end of the input amplifier circuit A. An output end of the input amplifier circuit A is connected with a center tap on a primary winding ofthe transformer T1. Two ends of the primary winding of the transformer T1 are connected with the modulator C. Two ends of a secondary winding of the transformer T1 are connected with the demodulator D. The modulator C and the demodulator D are connected with a clock module at the same time. The center tap of the secondary winding of the transformer T1 is connected with an inverted input end of theoperational amplifier B. A positive phase input end of the operational amplifier B is grounded. The output end of the operational amplifier B is connected with the inverted input end of the operational amplifier B through utilization of a negative feedback resistor R14. When the isolation amplifier is applied, signals can be received in a relatively wide dynamic range, and moreover, very high linearity is kept.

The invention is suitable for the technical field of SVC device safety detection, and provides a thyristor overvoltage detection circuit used for a TCR type high-voltage SVC device. AC voltage of the two ends of a thyristor is rectified into positive half-wave voltage by a rectification circuit. Positive half-wave generated through rectification is scaled to voltage range of the input end of an isolation amplifier by a high-voltage side differential proportion amplification circuit. Voltage signals detected by a high-voltage side circuit are transmitted to a low-voltage side circuit in an isolation mode by the isolation amplifier. Voltage outputted by the isolation amplifier is amplified and outputted to an overvoltage judgment and comparison circuit by a low-voltage side differential proportion amplification circuit. The detected voltage and an overvoltage threshold value Vref are compared via the judgment and comparison circuit. The thyristor is triggered to be conducted by controlling a thyristor trigger circuit according to the comparison result when the thyristor is overvoltage. The circuit is quite concise, element price is low, and problems that conventional high-voltage thyristor overvoltage detection circuits are high in cost, complicated in circuit and inflexible in overvoltage parameter setting can be solved.

The invention discloses a signal conditioning card, comprising a signal attenuation module, a signal isolation amplifier module and an isolation voltage-stabilized source module, wherein the signal isolation amplifier module is connected with the signal attenuation module; the isolation voltage-stabilized source module is used for providing a working power supply voltage for the signal isolation amplifier module; the signal attenuation module comprises a first relay unit, a second relay unit and an attenuation unit; the attenuation unit is respectively connected with the first relay unit and the second relay unit; the signal isolation amplifier module comprises an isolation unit and a signal amplifier unit; the isolation unit is connected with the second relay unit; and the signal amplifier unit is connected with the isolation unit. In addition, the signal conditioning card also comprises a driver module and a decoder; the driver module is connected with the first relay unit and the second relay unit; and the decoder is connected with the driver module. The signal conditioning card has the advantages of isolating input signals from output signals, protecting measuring instruments,ensuring follow-up precision values on measuring PXI equipment, improving use flexibility of the measuring instruments, and being simple in circuit and strong in practical applicability.

The invention relates to an atomic spectral line detection device, a system closed loop time measurement method and a control method of modulation frequency and light intensity detection frequency. The detection device comprises a constant current source module, a power amplifier, a laser driving module, a laser, a self-stabilization frequency module, a grating, a beam splitter, an optical isolator, a control module and an absorption bubble, and further comprises a servo unit, a first photoelectric detection module, a second photoelectric detection module, a third photoelectric detection module, a DDS module, a frequency multiplier, a microwave generation module, an isolation amplifier and a VCXO module. According to the detection device, after a loop is locked, each part only works in a small linear zone near the central frequency, and the closed loop process of the whole system from quantum frequency discrimination to servo deviation rectification of every time can be considered as constant. Based on this, the improved atomic spectral line high-precision detection device based on the laser, the system closed loop time measurement method and the control method of the modulation frequency and the light intensity detection frequency are provided.

The invention discloses a bus throttle and a control method thereof. The bus throttle comprises an electronic throttle, an engine ECU, a main controller and a wireless remote-control device, wherein the CAN line of the engine ECU, the CAN line of the main controller, and the CAN line of the wireless remote-control device are connected in parallel to a CAN 1939 bus, and an engine controller and the main controller perform signal communications through the CAN bus; after converted by a U / I isolation amplifier, the output signals of the electronic throttle enter the main controller. The invention further discloses a control method based on the bus throttle. According to the control method disclosed by the invention, the electronic throttle of analog quantity is converted into the bus throttle, under the conditions that the wireless remote-control device is adopted and any engine is configured, the electronic throttle and the wireless throttle can respectively and normally work.

The invention discloses an automatic testing device of make-and-break of superconducting coil quench protection signal transmission line in a fusion device, which includes a master control equipment PLC (programmable logic controller) and an isolation amplifier, wherein the PLC includes an analog quantity input module, three input ends and three output ends corresponding to the input ends; the three input ends are connected with three switches respectively; the other ends of the three switches are connected with a common end of the PLC; the three output ends are connected in series with a PLCnodal point, a DC power module and a relay; the other end of the relay is connected with the common end of the PLC; the relay includes normal open ends J1-1, J2-1 and J3-1 respectively; the J1-1 is connected in parallel with the isolation amplifier; the J2-1 is connected in series with a constant voltage source and connected in parallel with the isolation amplifier; the J3-1 is connected in series with a constant current power and then connected with the isolation amplifier in parallel; the output signals of the isolation amplifier are connected into the analog quantity input module of the PLC; the PLC is in cable connection with a host computer monitor and display interface through a communication interface PPI; and the information collected by the master control equipment PLC is displayed through the host computer monitor and display interface. The automatic testing device has a friendly interface, is simple to operate, can store and search data at any time, and facilitates further analyzing and problem solving.

The present invention relates in general to the field of interface technology. Electronic components, such as modular converters for measurement control and regulation technology, in particular isolation amplifiers, are known from interface technology. Such isolation amplifiers can be used for galvanic separation, conversion, amplification and filtering of standard, normal signals and for matching analog signals. These isolation amplifiers are galvanically separated from one another in the input, output and supply circuits. According to the invention, a separate component of a transformer is integrated for separation into a circuit board of an isolation amplifier with the aid of SMD mounting technology, wherein the transformer contains a combination of inductive components, consisting of a magnetic core and a winding, and a substrate which contains internal printed conductors that form planar short-circuit windings.