99 results about "Cascade circuits" patented technology

The invention discloses a current-to-voltage conversion circuit structure for electroporation delivery. The current-to-voltage conversion circuit structure comprises a current-to-voltage conversion circuit and a voltage-to-pulse conversion circuit. The current-to-voltage circuit converts current signals into voltage through an input signal processing module, high-precision amplification is achieved through an operational amplifier and a feedback network of a signal amplification module, the driving capacity is enhanced through a transistor cascade circuit, and temperature drift is dynamically compensated in combination with a thermistor. The voltage-to-pulse circuit corrects non-linear errors through a resistance network of the linearization processing module, achieves gain adjustment through an operational amplifier and an adjustable resistor, and finally adapts to load changes through a field effect transistor and a negative feedback network. The circuit realizes high conversion precision, wide temperature range stability and load adaptive capability, and is suitable for high-precision scenes such as medical treatment or beauty electroporation, industrial sensing and the like.

The invention provides a double-phase pulse circuit and a high-frequency pulse therapeutic apparatus, and relates to the technical field of medical instruments, and the double-phase pulse circuit comprises a booster circuit, N groups of pulse modulation isolation transformation circuits, an amplitude-limiting current-limiting circuit, a cascade circuit, a double-phase wave modulation circuit and a main controller, the boost circuit performs pulse modulation and boost processing on the output DC voltage of the target DC power supply to obtain an initial pulse voltage signal; n groups of pulse modulation isolation transformation circuits respectively perform isolation boosting processing on the initial pulse voltage signals to obtain N high-voltage pulse signals; the amplitude-limiting current-limiting circuit performs amplitude-limiting current-limiting processing on the N high-voltage pulse signals to obtain N high-voltage square-wave pulse signals; performing cascade processing on the N high-voltage square-wave pulse signals to obtain a target square-wave pulse signal; and performing dual-phase modulation on the target square wave pulse signal to obtain a target dual-phase pulse signal. According to the technical scheme, the effect of improving the safety of the double-phase pulse circuit is achieved.

The invention provides a PWM / Buck cascade circuit auxiliary electrolytic hydrogen production rectification power supply and a control method, and relates to the technical field of electrolytic hydrogen production power supply and intelligent power grids, and the power supply comprises a main power loop and an auxiliary power loop; the main power loop comprises a multi-pulse thyristor rectifier, the power supply side of the multi-pulse thyristor rectifier is connected with an alternating-current power grid, the load side of the multi-pulse thyristor rectifier is connected with one end of a direct-current smoothing reactor, and the other end of the direct-current smoothing reactor is connected with the electrolytic bath; the auxiliary power loop comprises a PWM rectifier and a Buck circuit which are connected in series, the output end of the Buck circuit is connected to the output end of the main power loop in parallel through a direct-current LC filter, the output end of the Buck circuit and the output end of the main power loop are jointly connected into an electrolytic bath for ripple compensation, the multi-pulse rectifier adopts PI control, the PWM rectifier adopts voltage and current double-closed-loop control and SVPWM modulation, Buck adopts PI and feedforward compound control, and the output end of the Buck circuit and the output end of the main power loop are connected in parallel. The system has the advantages of improving the grid-side electric energy quality, the voltage utilization rate, the water electrolysis hydrogen production efficiency and the operation stability.

The invention relates to the technical field of integrated circuits, and provides a clock signal bootstrap circuit, a cascade circuit, a chip and electronic equipment. The clock signal bootstrap circuit comprises a first bootstrap module, the first bootstrap module comprises a first transistor, a second transistor, a third transistor and a first capacitor, a first pole of the first transistor is connected with a first pole of the second transistor and serves as a first input end, and a second pole of the first transistor is connected with a first end of the first capacitor and serves as a second input end. The third electrode of the first transistor is connected with the third electrode of the second transistor and the first electrode of the third transistor and serves as an output end, the second electrode of the second transistor is connected with the second electrode of the third transistor and the second end of the first capacitor, and the third electrode of the third transistor is connected with power supply voltage; the first bootstrap module receives the first clock signal and the second clock signal and outputs a third clock signal. The clock signal bootstrap circuit can reduce electric leakage, thereby improving bootstrap efficiency and reducing power consumption.

The invention discloses an active clamping control method and device and a switching power supply, and the method comprises the steps: determining whether a buck-boost cascade circuit is in a no-load state or a light-load state, and enabling the working mode of the buck-boost cascade circuit to be set as a discontinuous mode, the active clamping control mode of the buck-boost cascade circuit is set as a leading edge non-complementary mode; or, the working mode of the buck-boost cascade circuit is set to be a forced continuous mode, and the active clamping control mode of the buck-boost cascade circuit is set to be a trailing edge non-complementary mode; and determining that the buck-boost cascade circuit is in a heavy load state, setting the working mode of the buck-boost cascade circuit as a continuous mode, and setting the active clamping control mode as a trailing edge non-complementary mode. Corresponding sequential logic can be matched according to different working modes, the clamping effect of peak voltage at the two ends of a switching tube is optimized, ZVS can be achieved in a continuous mode, and the efficiency of the switching power supply is improved.

The invention provides a structure and function integrated phased-array antenna multi-physics field co-simulation optimization method. The method comprises the following steps: splitting an overall model of an antenna; electromagnetic simulation is carried out on the power division network electromagnetic simulation model, circuit simulation is carried out on the chip equivalent spice cascade circuit simulation model, full-array thermal simulation is carried out on the full-array thermal simulation model, force simulation is carried out on the radome force simulation model, and circuit simulation is carried out again on the chip equivalent spice cascade circuit simulation model in sequence; performing electromagnetic simulation by each antenna sub-array electromagnetic simulation model; all the sub-array directional diagrams are subjected to full-array directional diagram synthesis; judging whether the parameters output by each simulation model in the co-simulation optimization whole process meet the preset requirements or not, and if so, completing the road, heat, force and electromagnetic multi-physical field co-simulation optimization; otherwise, adopting an optimization algorithm to adjust the optimization variable of the simulation model of the corresponding module; according to the method, efficient collaborative joint simulation optimization of the antenna under the coupling action of multiple physical fields such as force, heat and electricity is realized.

The utility model discloses an electromagnetic door lock control circuit and device, including: power supply circuit, cascade circuit, induction identification circuit, electromagnet drive circuit and MCU master control circuit, MCU master control circuit is electrically connected with said power supply circuit, cascade circuit, auxiliary output circuit and electromagnet drive circuit respectively. The electromagnetic door lock circuit provided by the utility model not only can detect the opening and closing of the electromagnetic door lock, but also can detect whether one or more electromagnetic door locks on a production line are illegally opened or not in a cascade control circuit mode through a serial structure, and sends an abnormal signal to an upper computer for identification; in this way, the upper computer can know which device the electromagnetic door lock of which device is not closed or has a fault, and production accidents caused by illegal opening of the electromagnetic door lock are prevented.

A readout circuit for a MEMS sensor unit. The readout circuit includes at least one circuit component which includes a cascade circuit including at least one input amplifier and at least one output amplifier. A predefined external supply voltage is available for operating the readout circuit. In the process, the input amplifier is operated with a first supply voltage which is, by comparison, less than or equal to the external supply voltage, and the output amplifier is operated with a second supply voltage which is, by comparison, greater than the external supply voltage. At least one circuit means, which makes the second supply voltage is also provided, which is, by comparison, greater than the external supply voltage, available to the output amplifier.

The invention discloses a configurable cascade circuit for efficient in-memory processing, which comprises an integrated state machine module, a cascade instruction distributor unit, a configuration register unit, a configurable cascade calculation engine and an on-chip storage unit, and forms a complete in-memory calculation processing chain. The state machine dynamically adjusts the circuit operation state; the cascade instruction distributor unit decomposes a cascade instruction into discrete operation blocks and loads the discrete operation blocks into a plurality of registers in the configuration register unit; the decoder unit generates a control word containing the serial number of the in-memory computing unit and the channel configuration parameters of the in-memory computing unit; and the configurable cascade computing engine enables the corresponding in-memory computing unit according to the control word, and after the in-memory computing unit is driven to complete a specified computing task, intermediate cache data is written into the on-chip storage unit in real time by adopting a double-BRAM dynamic cache strategy. And circularly controlling the iteration work of the calculation unit in the memory until the cascade termination signal triggers and outputs a final calculation result. According to the invention, a calculation-caching-transmission integrated assembly line is constructed.

The invention relates to the field of clean energy electrolysis hydrogen production, in particular to a three-section electrolytic bath hydrogen production power supply system and a power supply control method thereof. According to the system, an alternating current bus module is connected with three-phase alternating current and provides a three-phase alternating current power supply; the power supply conversion module comprises three power supply conversion units, the three power supply conversion units are jointly connected to the alternating current bus module in parallel, and each power supply conversion unit converts the three-phase alternating current power supply into a working direct current power supply; the three-section type electrolytic bath comprises three sub-electrolytic baths which are connected in series, and each sub-electrolytic bath is correspondingly connected with one power supply conversion unit to obtain the working direct-current power supply; the power supply conversion unit comprises a rectification circuit, a three-level BUCK circuit and a resonance LLC cascade circuit which are connected in sequence. According to the invention, accurate power distribution and independent decoupling control of a load section are realized through the independent modular power supply; meanwhile, harmonic interference is restrained, the power factor is improved, and device stress and line loss are reduced.

The utility model discloses a nine-channel constant current drive cascade circuit, and relates to a series of fields requiring intelligent control and memorizing of different scenes, such as LED illuminating lamp dimming, LED control protocols and the like. Comprising a DC power supply DC wiring terminal positive electrode, a DC power supply DC wiring terminal negative electrode, and current limiting resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17 and R18. A protection resistor R19, a protection resistor R20 and a protection resistor R21; the LED lamp further comprises light emitting diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17 and D18. The circuit also comprises capacitors C1, C2 and C3. Comprising backward diodes TD1 and TD2; the system also comprises a TM1926 chip U1, a TM1926 chip U2, and a micro control unit (MCU). The PWM brightness of the output port of the circuit can be independently set through an external controller, the number of peripheral devices is small, the circuit cost can be remarkably reduced, the performance is stable and reliable, and technical support is provided for merging TTL signal fantasy lamps into an integrated Internet of Things system.

The embodiment of the invention discloses a fast charging chip cascade circuit and a control method thereof, and relates to the technical field of switching power supplies, the fast charging chip cascade circuit comprises an AC / DC conversion loop and at least two fast charging chips; the fast charging chip comprises a logic control module, a cascade communication module and a constant voltage loop. The cascade communication module is provided with a cascade pin, a signal receiving pin and a signal sending pin, and the cascade pins of all the quick charge chips are electrically connected; the input end of the logic control module is electrically connected with a signal receiving pin and a signal sending pin in a corresponding fast charging chip, the output end of the logic control module is electrically connected with the constant voltage loop, and the constant voltage loop is electrically connected with the alternating current and direct current conversion loop. The voltage regulation conflict in the cascade state is effectively avoided, and the voltage regulation accuracy of the output voltage is improved.

According to the double-line cascaded LED driving circuit and the communication method thereof provided by the invention, two lines, namely the clock line and the data line, are adopted, and data communication and connection between LED drivers are realized through a communication mode of two-line input and two-line output; meanwhile, the forwarding identification in the input data is obtained through the arranged data cascade circuit in the LED driver, and the clock signal and the data corresponding to the forwarding identification are used as the input driving data of the LED driver of the next level based on the forwarding identification, so that the LED driver of the whole driving unit only needs to drive one LED driver, and the driving efficiency is improved. Therefore, high-speed data transmission can be realized, and meanwhile, the wiring mode between the controller and the LED drivers and the wiring mode between the LED drivers are simplified, and the hardware wiring difficulty is lowered.

A method for contingency table-based bit-stream simulation to enhance simulation speed and precision in systems comprising reconvergent bit-stream paths. By utilizing the disclosed method, which relies on scalar-based processing, users may reduce the probability of correlation errors in design.

The invention discloses an aluminum alloy melt rapid and uniform cooling device and method.The aluminum alloy melt rapid and uniform cooling device comprises a box body, an upper cooling unit, a lower refrigeration cycle unit and a control unit, the upper cooling unit is provided with a plurality of independent controllable coolers, and each independent controllable cooler comprises a heat insulation protection sleeve, a spiral heat exchange pipe, a heat conduction sleeve and a crucible from outside to inside; a thermocouple arranged in a quartz tube at the bottom of the crucible extends to the geometric center of the melt for real-time temperature measurement, the lower part adopts a high-temperature and low-temperature cascade loop for cooling, a safety branch is connected in parallel to maintain low-load operation of the compressor, and a control unit dynamically regulates and controls an electromagnetic valve, the compressor and an expansion valve through a PLC based on temperature measurement data. According to the cooling method, precise temperature control is achieved through system self-inspection, graded starting, temperature threshold value switching and safe shutdown, the multiple melts can be synchronously, rapidly and evenly cooled, the internal temperature difference is reduced, component segregation and structure non-uniformity are restrained, sampling consistency is guaranteed, and reliable support is provided for aluminum alloy melt quality evaluation.

A back-to-back multi-port conversion circuit based on 3N + 3 switch module cascading comprises m input end hexagonal star type cascade circuits, six multi-port converters and n output end hexagonal star type cascade circuits, one end of each input end hexagonal star type cascade circuit is connected with a generator through a three-phase line, and the other end of each input end hexagonal star type cascade circuit is connected with a power supply through a three-phase line. The other end of the input end hexagonal star type cascade circuit is connected with alternating current input ports of the six multi-port converters through six groups of three-phase lines respectively; one end of the output end hexagonal star-shaped cascade circuit is connected with alternating current output ports of the six multi-port converters through six groups of three-phase lines, and the other end of the output end hexagonal star-shaped cascade circuit 3 is output through the three-phase lines. According to the design, the frequency is completely decoupled, the port voltage and current waveform effects are good, the topological port expansion is very flexible, and the developable potential functions are very powerful.

The invention discloses a display panel and a display device. The display panel comprises a central area, a first area and a second area, the central area is located between the first area and the second area in the first direction, and the central area comprises a cascade circuit; and / or, the display panel comprises a first type of signal lines extending along a second direction, the cascade circuit of the display panel comprises a plurality of shift registers arranged and cascaded along the second direction, the first type of signal lines are electrically connected with the shift registers, and in the first direction, the first type of signal lines are electrically connected with the shift registers. The distance between the shift register and the edge of the display panel is smaller than the distance between the first type signal line and the edge of the display panel, and the first direction intersects with the second direction. According to the display panel and the display device provided by the embodiment of the invention, the cascade circuit can be prevented from being damaged when the display panel is cut, so that the cut display panel is prevented from being damaged.

A self-protection circuitry is configured to receive a first power source. The self-protection circuitry includes a first transistor circuit, a first switch circuit, and a control circuit. The first transistor circuit includes a first input terminal, a first output terminal, and a first control terminal. The first output terminal is electrically connected to a ground terminal, and the first input terminal is configured to receive the first power source. The first switch circuit is electrically connected to the first control terminal and the first input terminal. The control circuit is electrically connected to the first switch circuit, and is configured to: before the first power source supplies power to the first transistor circuit, control the first switch circuit to be 10 conducted, and after the first power source continuously supplies power to the first transistor circuit, control the first switch circuit to be cut off.

The application provides a cascade circuit of an isolated converter and a control method, wherein the cascade circuit of the isolated converter comprises a control module, a non-isolated converter and an open-loop isolation module. According to the application, the non-isolated converter respectively feeds back a bus voltage determined according to a first duty cycle of the non-isolated converter to the open-loop isolation module and the control module, the open-loop isolation module feeds back an output voltage determined according to the bus voltage to the control module, the control module determines a second duty cycle according to the bus voltage and the output voltage, and feeds back the second duty cycle to the non-isolated converter, and the bus voltage is determined again through the second duty cycle, so that the adjusting speed of the non-isolated converter and the open-loop isolation module of the two stages of the isolated converter is accelerated, the dynamic characteristic is relatively strong, and the application is suitable for fast charging. Meanwhile, the open-loop isolation module is adopted to avoid resource waste, and is especially suitable for the non-isolated converter with a wide voltage regulating range of the front stage.

The utility model provides a cascade power supply circuit and a moving object detection device, and the cascade power supply circuit comprises one or more different cascade units which are sequentially arranged between a battery and a load to form a cascade circuit structure between the battery and the load. The cascade units are arranged to be sequentially connected one by one along an electric energy transmission path between the battery and the load, each cascade unit depends on electric energy supply of the previous cascade unit and stores the electric energy after being connected, so that when the subsequent next cascade unit is connected, the electric energy is jointly obtained from the battery, the current cascade unit and / or the previous cascade unit. Electric energy is provided for the next cascade unit; and when the current sequentially passes through the plurality of cascade units, the cascade units store and transfer electric energy step by step.

The invention provides a power synthesis circuit, a radio frequency circuit, a radio frequency power supply and semiconductor process equipment, and is applied to the technical field of semiconductor equipment, the circuit comprises a plurality of synthesis transformers, the primary side of each synthesis transformer is used for being connected with a power amplification module, and the secondary side of each synthesis transformer is sequentially cascaded to form a cascade circuit; and outputting a synthetic power by the obtained cascade circuit. As the secondary sides of the synthesis transformers are cascaded in sequence, the power synthesis circuit synthesizes and outputs the power provided by the power amplification modules in a voltage superposition form, any two adjacent power amplification modules are isolated through the two synthesis transformers, a balance resistor is cancelled, and when any one power amplification module is abnormal, the power amplification module is switched off. When the abnormal module is detected, only the power reduction value corresponding to the abnormal module is reduced, the output of other power amplification modules in the power synthesis circuit is not influenced, greater power loss is avoided, and the reliability and the stability of the power synthesis circuit in the working process are effectively improved.

The invention discloses a cascade circuit synchronous rectifier tube control method, a control device and a switching power supply. The control method comprises the following steps: acquiring a peak value of an inductive current, a valley value of the inductive current and total excitation demagnetization time of the inductive current; the valley value of the inductive current is compared with a first threshold value, the peak value of the inductive current is compared with a second threshold value and a third threshold value, and the total excitation demagnetization time of the inductive current is compared with a fourth threshold value and a fifth threshold value; determining when the driving of the secondary side synchronous rectification circuit is switched on or switched off according to the comparison result; wherein the first threshold value is used for determining when to turn off the driving of the secondary side synchronous rectification circuit in each period; the second threshold value and the fourth threshold value are used for determining that the drive of the secondary side synchronous rectification circuit is not sent out in the next period, the third threshold value and the fifth threshold value are used for determining that the drive of the secondary side synchronous rectification circuit is sent out in the next period, the second threshold value is smaller than the third threshold value, and the fourth threshold value is smaller than the fifth threshold value. The efficiency of the switching power supply can be improved.

The utility model relates to the technical field of photovoltaic power generation, and discloses an inverter topological structure, which comprises an MPPT cascade circuit, a DC voltage conversion circuit and an inverter circuit, and is characterized in that the MPPT cascade circuit can independently track the maximum power of each photovoltaic module string and adjust the output current and the output voltage of each photovoltaic module string; the output of other photovoltaic module strings is adapted, and the wooden barrel effect of the photovoltaic module string of the inverter is solved; the combination of the MPPT cascade circuit and the direct-current voltage conversion circuit realizes the assembly-level maximum power tracking adaptive to the whole range in the single inverter, and can meet the work of a single assembly to provide a voltage source meeting conditions for a post-stage circuit; and the inverter circuit can meet the functional requirements of reactive power dispatching of the power grid.

The utility model relates to an E-band high-gain millimeter wave low-noise amplifier, which aims to solve the problems of low voltage gain, low sensitivity and the like of the conventional low-noise amplifier. The low noise amplifier comprises an input matching circuit, an output matching circuit, an inter-stage matching circuit and four stages of cascade circuits, and each stage of cascade circuit comprises a grid electrode bias circuit, a drain electrode bias circuit and a common source electrode transistor. The drain electrode and the grid electrode of the common source transistor in each stage of cascade circuit are respectively connected with a drain electrode bias circuit and a grid electrode bias circuit, the adjacent cascade circuits are connected through an inter-stage matching circuit, and the drain electrode bias circuit comprises a filtering stabilizing circuit. The inter-stage matching circuit between the adjacent cascade circuits is composed of an inter-stage capacitor and an inter-stage microstrip line which are connected in series. The gain of the E-band low-noise amplifier can reach more than 20dB, the typical value of the noise coefficient is 5dB within the broadband of 75-90GHz, and the E-band low-noise amplifier has higher sensitivity.

The present invention provides a communication method for a single-line cascade circuit, a single-line cascade circuit and a display system. The method comprises: encoding a first data packet output by a main control unit in a BMC encoding mode, such that a transition edge will be generated at each joint between adjacent data bits of the first data packet; upon receiving an ith data packet, an ith driving unit detecting transition edges in non-preamble bit fields in the ith data packet; and when an initial transition edge in the ith data packet is detected, the ith driving unit outputting an (i+1)th data packet to an (i+1)th driving unit. In this way, it is ensured that the driving units transmitting signals can receive complete data packets, so as to achieve clock synchronization between adjacent driving units, thus eliminating the problems such as data catchup or data overwrite caused by asynchronous communication during cross-driving unit communication, and effectively increasing the success rate of communication in single-line cascade circuits.

The embodiment of the invention provides a circuit suitable for on-line monitoring of the on-state voltage drop of a crimping type IGBT, and a silicon carbide cascade circuit comprises at least two silicon carbide JFETs. The first end of the low-voltage clamping circuit is electrically connected with one end of the sampling circuit; the second end of the low-voltage clamping circuit is electrically connected with the other end of the sampling circuit; the third end of the low-voltage clamping circuit is electrically connected with one end of the silicon carbide cascade circuit; the other end of the silicon carbide cascade circuit is used for being connected with one end of a monitored IGBT; and the second end of the low-voltage clamping circuit is also used for being connected with the other end of the monitored IGBT. According to the scheme, the silicon carbide JFETs are cascaded to withstand high voltage of 4.5 kV and above, the voltage on each JFET is distributed in a balanced mode, the output voltage is clamped to be below 5V, meanwhile, the on-state voltage drop of the IGBT can be accurately transmitted to a sampling circuit, meanwhile, the transmission error of the on-state voltage is low, the proposed clamping circuit does not need an additional power supply and a compensation circuit, and the clamping circuit is simple in structure and low in cost. The method has the advantages of high precision, fast response and low cost.

The utility model provides a photovoltaic power generation cascade circuit and photovoltaic power generation equipment, and relates to the photovoltaic field, and the photovoltaic power generation cascade circuit realizes parallel switching of MPPT controllers in photovoltaic power generation branches through a photovoltaic power generation main circuit and two-way switches arranged in a plurality of photovoltaic power generation branches which are connected in parallel with each other. The power generation power in the photovoltaic power generation branch circuit can be integrally input into the photovoltaic power generation main circuit in parallel under the condition that the power generation efficiency is relatively low, so that the input power of the MPPT controller in the photovoltaic power generation main circuit is improved, the low-power tracking conversion loss is reduced, the overall tracking efficiency is improved, and the photovoltaic power generation efficiency is favorably improved.

The utility model relates to the technical field of IO-Link, in particular to an IO-Link slave station circuit supporting cascading, which comprises a master control module, a power supply module, a cascading circuit, an IO-Link communication circuit and a digital quantity interface circuit, wherein the master control module is in data communication with IO-Link master station equipment through the IO-Link communication circuit; according to the cascading IO-Link slave station circuit provided by the utility model, an expansion port of a slave station can be cascaded with a slave station by using an IO-Link communication interface, communication between a first-stage slave station and a second-stage slave station can be carried out at a distance of 20m, and the distance between the second-stage slave station and a master station can reach 40m. And thus, higher flexibility is brought to on-site signal acquisition and control.

The invention provides an acquisition circuit and acquisition equipment. The acquisition circuit comprises a power supply end, a load connection end, a multi-channel sampling circuit and a control circuit. The multi-path sampling circuit is electrically connected with the power supply end and the load connection end respectively; and each sampling circuit at least comprises two sampling branches which are connected in parallel. The control circuit comprises a controller and a cascade circuit electrically connected with the controller, the cascade circuit comprises multiple paths of enabling ports, the enabling ports are correspondingly and electrically connected with the sampling branches, and the controller controls the multiple paths of sampling circuits to perform independent sampling or synchronous sampling through the multiple paths of enabling ports; wherein one corresponding sampling branch is controlled to perform sampling through one enabling port. According to the sampling circuit, independent sampling or synchronous sampling of the multiple sampling circuits can be achieved, so that the multi-channel testing requirement is met, each sampling circuit can control the corresponding sampling branch to conduct sampling according to the actual situation, accurate testing is achieved, the testing requirement is met, and the user experience is improved.

The application discloses a series connection unit cascade circuit and a high-voltage cascade device, and relates to the field of circuit design.The series connection unit cascade circuit comprises a first series connection unit, a second series connection unit, a voltage dividing circuit, a floating ground and a floating resistor.The first series connection unit and the second series connection unit are connected in series to meet the high-voltage requirement of the high-voltage cascade device, and the power supply ends of the first series connection unit and the second series connection unit are connected with the floating ground through the voltage dividing circuit.The floating ground is connected with the ground through the floating resistor, so that the highest voltage between the devices in the first series connection unit and the second series connection unit and the floating ground at any time will not be greater than the voltage of the power supply for supplying power to the series connection unit, thereby solving the working voltage endurance problem of the devices in the series connection unit, and enabling the high-voltage cascade device to integrate more series connection units.