51results about "Sinusoidal oscillations train generator" patented technology

A high-voltage transmitting circuit (100) for a catheter, and an ablation tool (1000). A first electrode (P1) and a second electrode (P2) are provided on the catheter. The high-voltage transmitting circuit (100) comprises: a first transmitting circuit (110), wherein a first end of the first transmitting circuit (110) is connected to a high-voltage positive electrode (+HV), a second end of the first transmitting circuit (110) is connected to a high-voltage ground (GND), and a third end of the first transmitting circuit (110) is connected to a high-voltage negative electrode (−HV); a filtering circuit (120), wherein an input terminal of the filtering circuit (120) is connected to a transmitting terminal of the first transmitting circuit (110), an output terminal of the filtering circuit (120) is connected to the first electrode (P1), and the second electrode (P2) is connected to the high-voltage ground (GND); and a control circuit (130), wherein the control circuit (130) is used for controlling the first transmitting circuit (110) to output an alternating-current (AC) square wave, which is subjected to filter processing by the filtering circuit (120) to form a sine wave between the first electrode (P1) and the second electrode (P2). In this way, the output of pulsed voltage waveform of the sine wave is realized, and therapeutic requirements in some ablation operations by pulsed electric field are satisfied, thereby expanding the application prospects of ablation technique by pulsed electric field in arrhythmia treatment.

The radio frequency (RF) generator includes a pulse generation circuit configured to obtain an input signal indicative of a pulse pattern that defines an envelope of a pulsed RF signal. The pulse generation circuit stores data values ​​that define power levels and durations of segments of the pulse pattern. The pulse generator generates pulse modulation control signals in response to the stored data values, the pulse modulation control signals indicative of the power levels and durations of each segment of the pulse pattern, and the pulse modulation control signals are provided to a control circuit to generate control signals to adjust the amplitude and duration or width of the RF signal to generate a pulsed RF signal having the pulse pattern.

The invention relates to an electrical stimulation device, an electrical stimulation signal generation method and a readable storage medium. The electrical stimulation device comprises: a control unit for outputting a control signal; the signal generation unit is used for generating a first signal and a second signal according to the control signal; the output unit is used for outputting a first signal and a second signal, the difference value of the first signal and the second signal is smaller than a threshold value, the first signal acts on a first time period of the stimulation period, and the second signal acts on a second time period of the stimulation period. By adopting the method, the problem of user pricking caused by unreasonable waveform design in the stimulation period can be solved.

This invention provides systems, apparatus, methods, and computer programs for RF pulses within pulses for semiconductor radio frequency (RF) plasma processing. [Solution] A method for generating a high-frequency (RF) waveform includes the step of defining an ON-OFF pulse train separated by an OFF state that does not have an ON-OFF pulse. The method further includes the step of generating an RF waveform by applying a multilevel pulse waveform that adjusts the magnitude of each ON-OFF pulse. The method includes the step of sending the RF waveform to an electrode.

The present invention provides a filtering and compensating device for a test transformer, which includes a harmonic detection unit, an instruction current operation unit, a trigger pulse generation unit, and a compensating current generation unit that are electrically connected in sequence; the harmonic detection unit is used to collect the voltage and current signals output by the induction voltage regulator; the instruction current operation unit is used to generate an instruction signal, the trigger pulse generation unit is used to send a pulse drive to the compensating current generation unit; the compensating current generation unit is used to generate a compensating current; the present invention can realize the automatic tracking compensation of the voltage waveform of the induction voltage regulator of the test transformer, effectively limit the high-order harmonics, and make the voltage waveform output by the induction voltage regulator as close to a sine wave as possible. The active filtering and compensation method can also compensate for the capacitive or inductive reactive power during the withstand voltage test, solve the under-compensation or over-compensation phenomenon that occurs when a capacitor or inductor with a fixed capacity is connected in parallel, and improve the capacity utilization rate of the test transformer.

The invention belongs to the technical field of micro-nano plasma switches and radio frequency and power circuits, and particularly relates to a frequency-adjustable high-power pulse signal generation circuit based on a micro-nano plasma switch, which comprises a sinusoidal signal generation module, a tuning module and a micro-nano plasma switch module, the sinusoidal signal generation module comprises an NMOS cross coupling pair, a PMOS cross coupling pair and an LC resonant cavity. The tuning module comprises a capacitor array and a frequency tuning module. A micro-nano plasma switch is used for realizing large-current transmission and is matched with a sine wave signal to generate a specific pulse signal. An inductor and a variable capacitor are introduced into the LC resonant cavity and the frequency tuning unit, and the capacitance value is adjusted by changing the end voltage of the capacitor, so that the circuit outputs a pulse signal of which the frequency covers a low frequency band to a terahertz frequency band under the control of different voltages. The pulse signal generated by the circuit has the characteristics of high power, picosecond-level rising edge and different repetition frequencies, and is suitable for terahertz communication, radar and other systems.

A system and method for generating a radio frequency (RF) waveform are described. The method includes defining a train of on-off pulses separated by an off state having no on-off pulses. The method further includes applying a multi-level pulse waveform that adjusts a magnitude of each of the on-off pulses to generate an RF waveform. The method includes sending the RF waveform to an electrode.

The invention relates to the technical field of numerical control machining, and discloses a sine wave modulation system for numerical control machining control. According to the sine wave modulation system for numerical control machining control, current and voltage data of the input end and the output end of a numerical control equipment power supply are collected, PMW signal high-level data of the numerical control equipment are collected, and the power supply system efficiency and the PMW signal duty ratio of the numerical control machining equipment are calculated according to the data; after a compensated sine wave value is generated, the compensated sine wave value is sent to a numerical control equipment control unit, PMW signal high level data is collected, real-time calculation and analysis are carried out according to the collected data, and the compensated sine wave value is updated in real time along with real-time changes of voltage and current of a power input end and a power output end of numerical control equipment. The voltage and current required by the motor of the numerical control equipment are adjusted in real time, obvious difference between an output signal and an ideal sine wave is reduced, the influence on the machining precision is reduced, and the machining precision is improved.

The invention relates to a driving circuit, electronic equipment and a control method. The driving circuit comprises a control circuit, an oscillating circuit and an energy storage circuit. The control circuit is connected with the energy storage circuit, and the oscillating circuit is respectively connected with the energy storage circuit and an ultrasonic sensor of electronic equipment; the control circuit is used for controlling the energy storage circuit to provide compensation energy for the oscillating circuit according to a control signal; wherein the control signal is determined according to the temperature of the electronic equipment; the oscillating circuit is used for generating a driving signal according to the compensation energy and energy generated by the oscillating circuit; the driving signal is used for driving the ultrasonic sensor to transmit an ultrasonic signal. By adopting the driving circuit, the influence of the temperature of the electronic equipment on the amplitude of the sine wave signal output by the oscillating circuit can be reduced, so that the influence on the emitted ultrasonic energy is reduced, and the fingerprint identification effect is ensured.

The invention provides a radio frequency power supply device and a radio frequency power supply system, the radio frequency power supply device comprises a radio frequency source, a gating unit and an analog impedance unit, the radio frequency source is used for outputting initial radio frequency electric energy, and the analog impedance unit has a first impedance value. The gating unit is selectively connected with the analog impedance unit and the load, the gating unit is used for being alternately connected with one of the analog impedance unit and the load at a preset period, and the preset period is larger than the period of the initial radio frequency electric energy. When the gating unit is connected with the analog impedance unit, an electric energy transmission path from the radio frequency source to the analog impedance unit is conducted, and the initial radio frequency electric energy is transmitted to the analog impedance unit, so that the electric energy of the initial radio frequency electric energy is consumed through the analog impedance unit; and when the gating unit is connected with the load, the electric energy transmission path from the radio frequency source to the load is conducted, and the initial radio frequency electric energy is transmitted to the load so as to supply energy to the load. According to the invention, the pulse-type radio frequency electric energy can be prevented from generating oscillation electric energy in the output process.

The invention relates to the technical field of encoder calibration, in particular to an encoder calibration circuit, a calibration method and an integrated circuit chip. According to the circuit, the input end of an analog signal comparison circuit is connected with a signal source and the reference signal output end of a processor, and the analog signal comparison circuit is used for comparing a reference signal output by the processor with an original sinusoidal signal output by the signal source and outputting a first comparison result through the output end; comparing the reference signal with the original cosine signal output by the signal source, and outputting a second comparison result through the output end; the processor obtains a first comparison result and a second comparison result, and outputs a first difference value between the original sinusoidal signal offset and the original cosine signal offset to the offset adjusting circuit; the offset adjusting circuit adjusts the offset of the original sinusoidal signal and the original cosine signal based on the first difference value, and outputs the sinusoidal signal after offset adjustment and the cosine signal after offset adjustment.

The embodiment of the utility model discloses a technical scheme, and provides a sine wave generating circuit which generates PWM signals through an amplification function circuit 11 formed by a PWM controller U1 and control function circuits 12 (U2A and U2B), and then converts the PWM signals into smooth sine waves through LC filtering function circuits L1 and C2-C6 to output. The whole circuit controls the amplitude and frequency of the output sine wave by adjusting the duty ratio of the PWM signal, and is suitable for an application scene needing to stabilize the sine wave signal. Compared with a traditional sine wave generating circuit (an amplifying circuit, a positive feedback network, a frequency selecting network, a radiation stabilizing circuit and the like), the sine wave generating circuit provided by the utility model is simpler in circuit structure and lower in price.

The invention provides an analog signal amplitude modulation circuit, a quartz tuning fork gyroscope circuit and a quartz tuning fork gyroscope, the amplitude modulation circuit comprises an operational amplifier U1, resistors R1, R2, R3 and R4 and a JFET, the JFET is represented by Q1, the number of the resistors R1 is two, an input signal of the amplitude modulation circuit is a high-frequency input signal ui, and an output signal of the amplitude modulation circuit is a high-frequency output signal uo; current generated by a high-frequency input signal ui enters the two branches at the same time, for the first branch, the high-frequency input signal ui flows to the ground after passing through one resistor R1 and parallel connection of R3 and Q1, and input voltage of the in-phase end of the operational amplifier is partial voltage of parallel connection of R3 and Q1; for the second branch, the current generated by the high-frequency input signal ui flows to the ground after passing through another resistor R1 and another resistor R2, and the current generated by the high-frequency input signal ui also flows into the inverting input end of the operational amplifier; in addition, the current generated when the high-frequency output signal uo passes through the R4 flows out of the inverting input end of the operational amplifier to form a negative feedback circuit. According to the invention, the higher harmonic interference of the gyro signal is reduced.

A power factor correction (PFC) controller for a PFC switching power supply is disclosed. The PFC controller includes an AC sense terminal, a DC sense terminal, and a reference signal generator coupled to the AC sense terminal. The reference signal generator is configured to receive a divided reference signal generated based on a modified version of an AC input signal and generate a synthesized reference signal using information indicative of an amplitude and a frequency of the divided reference signal. The reference signal generator is further configured to select one of the divided and synthesized reference signals as an output reference signal based on a current amplitude of the divided reference signal. The PFC controller is configured to, based on the output reference signal and a DC voltage sensed on the DC sense terminal, regulate output power provided to a downstream power converter coupled to the PFC switching power supply.

The present invention relates to the technical field of electronic equipment, and provides an analog signal output circuit, an electrical stimulation device and an electrical stimulation method. The analog signal output circuit includes a boost voltage regulation module, a digital-to-analog module and an output electrode. The boost voltage regulation module includes a chip U2, a resistor R5, a resistor R6, a resistor R8, a transistor Q1 and a capacitor C9; a branch at the FB pin of the chip U2 is connected to the collector of the transistor Q1 through the resistor R6, the base of the transistor Q1 is connected in series with the resistor R8, the emitter of the transistor Q1 is grounded, and the capacitor C9 is connected in parallel between the collector and the emitter of the transistor Q1; another branch at the FB pin is connected to the power supply output terminal VCES through the resistor R5. The digital-to-analog module includes a chip U5, the VCC pin of the chip U5 is connected to the power supply output terminal VCES, the VOUT0 pin of the chip U5 is connected to the first plug of the output electrode; the VOUT1 pin of the chip U5 is connected to the second plug of the output electrode.

The invention provides a double-frequency driving method for a pulse high-frequency ionization device, which comprises the following steps of: generating high-frequency low power for cold start ignition by using a continuous output high-frequency driving signal which is generated by a double-frequency driving device and is used for driving a low-power high-frequency power source; a pulse output high-frequency driving signal generated by the double-frequency driving device and used for driving the low-power high-frequency power source is used for generating high-frequency low power used for maintaining cold start ignition; the pulse output low-frequency driving signal generated by the double-frequency driving device and used for driving the high-power and high-frequency power source is used for generating low-frequency and high-power for generating high-yield plasma; according to the pulse high-frequency ionization device disclosed by the invention, two driving frequencies, the third-party power amplifier and the third-party adjustable vector impedance matching device are adopted; the plasma pulse power requirement of the specific frequency of a user and the pulse power requirement of the pulse high-frequency ionization device in the cold start ignition stage and the plasma continuation state maintaining stage can be considered at the same time.

The utility model discloses an arbitrary waveform generator which comprises an input connector, an output connector, a first waveform generation module, a second waveform generation module, a 40M crystal oscillator, an 8M crystal oscillator, a digital-to-analog conversion module, a first operational amplifier module, a second operational amplifier module, a first gain amplifier module and a second gain amplifier module. The input ports SCLK, SDIO and CS of the first waveform generation module and the second waveform generation module are in communication connection with the SPI; the 40M crystal oscillator and the 8M crystal oscillator are connected between CLKP ports of the first waveform generation module and the second waveform generation module; an SCL input port and an SDA input port of the digital-to-analog conversion module are respectively connected with an I2CSCL1 and an I2CSDA1 on the input connector; according to the utility model, SPI communication is built in, an on-chip mode memory is integrated, complex waveforms can be directly generated, the frequency and the degree of symmetry can be adjusted, and different waveforms, except for common sine waves, square waves and sawtooth waves, can alternately appear.

The invention aims to provide a system and a method for generating a three-phase horn modulated wave from a three-phase sinusoidal modulated wave. The system comprises a three-path multiplier (1), an amplitude conversion module (2), a first summation module (3), a channel selection module (4), a second summation module (5) and a third summation module (6). The method comprises the following steps: a, generating an original sine wave signal by using a sine modulation wave generation system; b, performing equal amplitude transformation on the three-phase original sine wave signal by using an amplitude transformation module 2 to obtain a synthetic amplitude Uamp of the three-phase original signal; c, setting a proportionality coefficient Coe, and rectifying the original sine wave signal by using a multiplier (1); d, obtaining the content Ucom of the injected original signal by using a second summation module (5); and e, superposing the original sine wave signal and the content Ucom of the injected original signal obtained in the step d to obtain a horn modulation wave signal. The invention is applied to the technical field of power electronics.

The invention provides a radio frequency power supply device and a radio frequency power supply system, the radio frequency power supply device comprises a radio frequency source, a gating unit and N output ends, the radio frequency source is used for outputting initial radio frequency electric energy, and the N output ends are used for being connected with N loads in a one-to-one correspondence mode. The gating unit comprises N gating modules, and each gating module is used for selectively connecting or disconnecting an electric energy transmission path between the radio frequency source and the corresponding output end so as to correspondingly transmit or stop transmitting the initial radio frequency electric energy to the corresponding load. Wherein the N gating modules comprise at least two target gating modules, each target gating module periodically conducts an electric energy transmission path between the radio frequency source and the corresponding output end, and when any target gating module conducts the electric energy transmission path between the radio frequency source and the corresponding output end, the radio frequency source is switched on by the target gating module. And the other N-1 gating modules all disconnect the electric energy transmission path between the radio frequency source and the corresponding output end. According to the invention, pulse-type radio frequency electric energy can be output to a plurality of loads.

The invention provides a sine wave excitation generation and overcurrent protection circuit of a displacement sensor, which relates to the technical field of airborne displacement sensors and comprises a second-order filter circuit, a blocking circuit, a proportional amplification circuit and a push-pull output circuit. The input of the second-order filter circuit is connected with an input square wave signal, and the second-order filter circuit is used for performing second-order low-pass filtering on the square wave signal; the input of the blocking circuit is connected with the output of the second-order filter circuit and is used for filtering a direct current component in the sine wave signal; the input of the proportional amplification circuit is connected with the output of the blocking circuit, and the proportional amplification circuit is used for conditioning the amplitude of the processed sine wave signal; and the input of the push-pull output circuit is connected with the output of the proportional amplification circuit and is used for improving the driving output capability so as to output a sensor excitation sine wave signal meeting the sensor excitation driving capability requirement. The circuit design structure is simple, the cost is low, hardware closed-loop control is adopted, the response speed is high, excitation signal output and overcurrent cut-off can be effectively carried out, and the precision of the output signal is not affected.

The invention discloses a signal simulator for a nuclear power station loose component monitoring system, and relates to the technical field of nuclear power station equipment monitoring, a man-machine interaction module receives signal parameters of an impact signal to be simulated by the signal simulator, and a controller controls a signal generation module to generate the signal parameters, the method comprises the following steps: generating a sine wave basic signal with a frequency corresponding to a signal parameter through a direct digital frequency synthesizer, converting the sine wave basic signal into an impact pulse with a width corresponding to the signal parameter through a pulse forming network, and carrying out frequency spectrum shaping on the impact pulse through a filter corresponding to the material of a to-be-simulated loose component. And finally, the impact pulse after frequency spectrum shaping is adjusted to an amplitude corresponding to a signal parameter through a gain amplification circuit, and a simulated impact signal is obtained. According to the invention, different signal characteristics of the impact signal generated by the impact of the loose part can be simulated from multiple angles, and the simulation precision of the impact signal generated by the impact of the loose part is improved.

The application relates to a resolver sensor signal simulation circuit. The application comprises a differential amplification circuit, a sine signal conversion circuit, a cosine signal conversion circuit, a first transformer isolation circuit and a second transformer isolation circuit. The excitation signal output end of an external controller is connected with the input end of the differential amplification circuit. The first input end of the sine signal conversion circuit and the first input end of the cosine signal conversion circuit are both connected with the output end of the differential amplification circuit. The second input end of the sine signal conversion circuit and the second input end of the cosine signal conversion circuit are both connected with the external control signal output end. The external control signal output end is used for outputting an external control signal. The output end of the sine signal conversion circuit is connected with the sine signal input end of the external controller through the first transformer isolation circuit. The output end of the cosine signal conversion circuit is connected with the cosine signal input end of the external controller through the second transformer isolation circuit. The application has the advantages of simple implementation and strong anti-interference performance.

A device comprises a radio frequency signal generator (100) which comprises a first signal path, a second signal path, a signal combiner (130), and a quadrature mixer (140). The first signal path is configured to generate an analog pulse (P1). The second signal path is configured to generate a delayed analog pulse (P2). The signal combiner is configured to combine the analog pulse and the delayed analog pulse to generate an analog compensation pulse (P3). The quadrature mixer is configured to utilize the analog pulse and the analog compensation pulse to modulate quadrature local oscillator signals and generate a radio frequency control signal (RF_OUT). The radio frequency control signal comprises a frequency that corresponds to a frequency of the quadrature local oscillator signals, and a pulse shape which comprises a shape of the analog pulse modified by a shape of the analog compensation pulse.

A novel adjustable light-operated memristive circuit belongs to the technical field of circuit design and is specifically provided with a magnetic signal generating circuit, an index signal generating circuit and a signal processing circuit, the input end of the magnetic signal generating circuit is connected with input voltage, the magnetic signal generating circuit is connected with a photoresistor, and the photoresistor is connected with the index signal generating circuit. The output end of the magnetic signal generating circuit is connected with the input end of the signal processing circuit through the index signal generating circuit. The beneficial effects are that the photoresistor is connected to the magnetic signal generation circuit, so that the circuit model can maintain the resistance state during power failure, and the resistance value can be changed according to illumination during power-on. Besides, the input charge state is regulated and controlled through the photoresistor, and the circuit resistance can change along with the charge quantity, so that different memristor hysteresis loop models are simulated, and meanwhile, a hysteresis loop simulation curve can be finely adjusted. The model not only improves the simulation precision of the memristor model, but also provides a new thought for optimizing the performance of the memristor in practical application.

A power factor correction (PFC) controller for a PFC switching power supply is disclosed. The PFC controller includes an AC sense terminal, a DC sense terminal, and a reference signal generator coupled to the AC sense terminal. The reference signal generator is configured to receive a divided reference signal generated based on a modified version of an AC input signal and generate a synthesized reference signal using information indicative of an amplitude and a frequency of the divided reference signal. The reference signal generator is further configured to select one of the divided and synthesized reference signals as an output reference signal based on a current amplitude of the divided reference signal. The PFC controller is configured to, based on the output reference signal and a DC voltage sensed on the DC sense terminal, regulate output power provided to a downstream power converter coupled to the PFC switching power supply.

The utility model relates to the technical field of beauty instruments, and discloses a function multiplexing pulse signal output circuit and a beauty instrument, and the circuit comprises a rectangular pulse signal generation module which is used for generating a rectangular pulse signal; the rectangular pulse signal shaping module is used for converting the rectangular pulse signal into a positive and negative symmetric rectangular pulse signal; the first function control module is used for outputting positive and negative symmetric rectangular pulse signals to the first metal electrode; the second function control module is used for converting the positive and negative symmetrical rectangular pulse signals into sine pulse signals and outputting the sine pulse signals to the second metal electrode; and the control module is used for conducting the rectangular pulse signal generation module, the rectangular pulse signal shaping module and the first function control module to execute a leading-in function, or conducting the rectangular pulse signal generation module, the rectangular pulse signal shaping module and the second function control module to execute a micro-current function. Function multiplexing of the beauty instrument can be realized based on the same circuit, the circuit composition is simplified, and the cost is reduced.

The application provides a power waveform generator with a four-quadrant feedback loop and a control method thereof. The generator is controlled by a user through a host computer and a graphical interface to output a first control signal and a second control signal. The first control signal is input to an FPGA+ARM main control board, parsed into secondary instructions and sent to an auxiliary FPGA, and then used to control a digital-to-analog converter to generate a digital-to-analog converted signal and output the signal to a four-quadrant analog feedback loop to generate an arbitrary waveform signal. The second control signal is directly used to control a bias adjustment circuit to output a suitable bias signal to the four-quadrant analog feedback loop. The four-quadrant analog feedback loop superimposes and processes the received signal to output a voltage and current signal to a bit number expansion circuit, and further drives an operational amplifier bootstrap network to generate a voltage drive waveform, and then generates an arbitrary-shaped power waveform through a push-pull output network.

The invention relates to a digital high-precision sine and cosine function generator circuit. The circuit comprises a digital processing circuit, a DAC conversion circuit and a phase discrimination circuit. An input signal of the digital processing circuit is a 16-bit parallel binary digital angle, and the digital processing circuit outputs sine and cosine angle digital quantity within the range of 0-90 degrees through programming operation. And the DA conversion circuit is used for performing digital-to-analog conversion on the sine and cosine angle digital quantity output by the digital processing circuit and then outputting an analog signal. And the phase discrimination circuit is used for carrying out phase control on the analog signal output by the DA conversion circuit and outputting sine and cosine signals in a range of 0-360 degrees. According to the invention, a large number of analog devices and precision resistors for calculating the boundary voltage are omitted, so that the circuit scale is greatly reduced; and by adopting a digital processing mode, the resolution expansion is very convenient, and the universal and platformization design is facilitated.

The application discloses a high-voltage energy storage battery cluster impedance spectrum excitation power generation method and system, and aims to solve the problem of unreasonable design of an existing excitation power generation system architecture, and the problem of fluctuation caused by superposition of alternating current excitation and direct current. The system comprises an energy storage battery cluster, a parallel bidirectional DC / DC converter, a power conversion system and a core control module. The energy storage battery cluster comprises a plurality of energy storage battery monomers. One end of the parallel bidirectional DC / DC converter is connected with the energy storage battery cluster, and the other end is connected with the power conversion system, and the parallel bidirectional DC / DC converter is used for bidirectional transmission of energy between the energy storage battery cluster and the power conversion system. The power conversion system is used for maintaining constant voltage operation of the system. The core control module is used for calculating and generating a modulation signal according to a sine reference excitation signal and circuit sampling data through a double-current loop closed-loop control strategy, so that the parallel bidirectional DC / DC converter controls the state of corresponding power switches based on the modulation signal, and sine excitation power generation is realized. The sine excitation signal generated through the system is more stable and accurate.

To provide a system and method for generating radio frequency (RF) pulse waveforms within a pulse for semiconductor RF plasma processing.SOLUTION: A method for generating pulses within a pulsed signal using a matchless RF source comprises: a step for defining an ON-OFF pulse train separated by an OFF state with no ON-OFF pulse; a step for generating RF waveforms by applying a multi-level pulse waveform that adjusts the magnitude of each of the ON-OFF pulses; and a step for delivering RF waveforms to electrodes.SELECTED DRAWING: Figure 9