46results about How to "No DC power consumption" patented technology

The invention provides a clamped beam direct heating type microwave signal detector, which comprises a six-port clamped beam coupler, a channel selection switch, a microwave frequency detector, a microwave phase detector and a direct heating type microwave power sensor, wherein the above parts are in cascaded connection to form the clamped beam direct heating type microwave signal detector. The six-port clamped beam coupler consists of a coplanar waveguide, a dielectric layer, an air layer and a clamped beam. The power coupling degree from the first port to the third port and the fourth port of the six-port clamped beam coupler, and the power coupling degree from the first port to the fifth port and the sixth port of the six-port clamped beam coupler are the same with each other. A to-be-measured signal is input via the first port and then is outputted to the direct heating type microwave power sensor via the second port. After that, the signal is outputted to the microwave phase detector via the fourth port and the sixth port and outputted to the channel selection switch via the third port and the fifth port. The seventh port and an eighth port of the channel selection switch are connected with the direct heating type microwave power sensor. The ninth port and the tenth port of the channel selection switch are connected with the microwave frequency detector. In this way, the power, the phase and the frequency of a microwave signal are simultaneously detected.

The present invention is applicable to the technical field of bluetooth communication, and provides a low-power-consumption tamper-proof bluetooth wristband, binding and management methods and systems for out-of-prison personnel. The server of the mobile terminal and the management terminal; the Bluetooth wristband is used to send tampering alarm information to the client of the prisoner outside the prison when the built-in conductive circuit is detected to be disconnected; the client of the prisoner outside the prison is used to receive the broken Demolition alarm information, and send the tamper alarm information to the server; it is also used to regularly send the GPS location information of the mobile terminal location to the server; the server is used to receive and save the tamper alarm information sent by the client terminal of the personnel outside the prison; It is also used to receive and save the GPS location information sent by the client of the prisoner outside the prison, and send a cross-border warning message to the client of the prisoner outside the prison when the preset activity area is exceeded. The management system for persons outside the prison provided by the invention has low power consumption and low cost.

A state-controllable symmetrical thermoelectric MEMS microwave standing wave meter of the present invention adopts a symmetrical directional coupler to extract the incident and reflected microwave power to the coupling end and isolation end of the upper and lower branches respectively; The MEMS microwave power sensor measures the power of each port of the two branches, and taking the average value can obtain more accurate incident and reflected microwave power, and then the standing wave ratio can be obtained; the designed two branches can also realize the measurement function, reducing The failure rate is improved; in order to realize the state transition function of the MEMS microwave standing wave meter, a MEMS microwave switch is added to its extraction branch; when the MEMS microwave switch is in the off state, the incident microwave power is no longer extracted and is directly transmitted to the output port. The loss of microwave power when no detection is required is reduced. The state-controllable symmetric thermoelectric MEMS microwave standing wave meter improves the reliability of the MEMS microwave standing wave meter, and has the characteristics of low loss, small chip area and compatibility with gallium arsenide monolithic microwave integrated circuit technology.

A TTL and CMOS compatible type input buffer comprises a reference voltage generator and an input buffer which comprises at least one stage input invertor which include a PMOS tube P1 and an NMOS tube N2, the grids of which are connected as an input end for inputting signal Vin, a source pole of the PMOS tube P1 is connected with a reference voltage VREF provided by the reference voltage generator; when the circuit works in the TTL mode, the reference voltage generator provides reference voltage VREF for the input invertor between 3.3 and 3.5 V, the turning point voltage of the input invertor is 1.4 V to make input noise margin maximum; when the circuit works in the CMOS mode, the reference voltage generator has no quiescent power dissipation, the reference voltage generator provides reference voltage VREF for the input invertor between 4.6 and 5 V, the turning point voltage of the input invertor is 2.5 V to obtain the maximum noise margin.

The invention relates to a ceiling lamp type impending earthquake alarm by the movement and the fall of a sphere into a spanned insulated ditch. A triangle plate is added at the top end of a horizontal hammerhead, a conical metal disk is arranged on the plane of the triangle plate, and a hole is arranged in the center of the conical disk. When the invention stands by, the metal sphere is arrangedat the upside of the hole; when the metal sphere shakes, moves and falls in the insulated ditch, an alarm circuit is bridged and switched on so as to send out alarms and in advance evacuate people who do not sense an earthquake yet. Particularly when the earthquake occurs late at night, the alarm not only sends out the alarms to wake up people in sleep to hurriedly evacuate, but also can automatically light a ceiling lamp in case people in an impending earthquake hurry can not touch a switch. The metal sphere absolutely can not send out the alarms in stillness, namely that a building absolutely can not collapse without reasons; when the metal sphere moves and falls, and the alarm sends out the alarms, namely that the building is in shake, and an earthquake portent occurs. The invention isoptimal quakeproof equipment for treating the earthquake occurring late at night.

The invention provides a clamped beam T-shaped junction direct heating type microwave signal detector. The clamped beam T-shaped junction direct heating type microwave signal detector is constituted by cascading a six-interface clamped beam coupler, a channel selection switch, a microwave frequency detector, a microwave phase detector and a direct heating type microwave power sensor; the coplanar waveguide length between two clamped beams is lambda / 4; the power coupling from a first interface to a third interface and to a fourth interface and from the first interface to a fifth interface and to a sixth interface of the six-interface clamped beam coupler is the same respectively, and a signal to be detected is input through the first interface, is output to the direct heating type microwave power sensor through a second interface, is output to the microwave phase detector through the fourth interface and the sixth interface, and is output to the channel selection switch through the third interface and the fifth interface; a seventh interface and an eighth interface of the channel selection switch are connected to the direct heating type microwave power sensor, and a ninth interface and a tenth interface of the channel selection switch are connected to the microwave frequency detector; the purpose of simultaneously detecting the power, the phase and the frequency of a microwave signal through one chip is achieved.

The MEMS pressure sensor based on the principle of frequency detection adopts a planar spiral inductor, and a MEMS variable parallel plate capacitor is set on one side of the inductor to form an LC resonant circuit; the MEMS capacitor is connected in parallel between the CPW signal line and the ground wire, and its upper pole The plate is a CPW signal line, and the upper plate is directly placed on the MEMS film, and a groove is set on the substrate directly below the MEMS film, and the lower plate of the MEMS capacitor is located on the bottom surface of the groove and two sides close to the ground wire and connected to the ground wire; both ends of the MEMS film are placed on the ground wire to form a closed cavity with the groove. The closed cavity is used to sense the external pressure. When the pressure difference between the inside and outside of the closed cavity changes, the MEMS film deflects, causing the capacitance between the upper plate and the lower plate of the MEMS capacitor to change, which makes the RF signal on the CPW transmission line The resonant frequency shifts, and the detected pressure can be characterized by measuring the resonant frequency value.

A silicon-based cantilever beam coupling indirect heating type millimeter wave signal detection instrument provided by the invention comprises three modules of sensors, analog-to-digital conversion and liquid crystal display, a sensor module comprises a cantilever beam coupling structure, a power distributor / combiners, indirect heating type microwave power sensors and switches, the substrate material is high-resistance Si, and power is detected through the indirect heating type microwave power sensors of a CPW signal line terminal corresponding to input ports; frequency detection is realized by use of the indirect heating type microwave power sensors to measure synthesis power of two paths of coupling signals whose phase difference at a center frequency is 90 degrees; and as for phase detection, the two paths of coupling signals whose phase difference at the center frequency is 90 degrees are synthesized with two paths of equally divided reference signals, and the indirect heating type microwave power sensors are also utilized to detect the synthesis power, thereby obtaining the phase of signals to be measured. The analog-to-digital conversion is realized by an MCS51 single-chip microcomputer, and the liquid display part consists of three liquid crystal display screens.

The invention discloses a slope control circuit of erase voltage of a nonvolatile memory and the nonvolatile memory, wherein the slope control circuit comprises a charge pump, a charge pump clock control unit and a detection unit; the charge pump is used for generating target voltage; the detection unit is used for producing the target voltage into detection voltage according to received pulse clock signals; and the charge pump clock control unit is used for comparing the detection voltage with reference voltage and outputs the received charge pump clock signals to a clock input end of the charge pump according to comparison results. The slope control circuit can control the rising slope of voltage by adjusting detection capacitance, reference voltage or the cycle of pulse clock signals, and the output of the charge pump does not have direct-current power consumption and has high efficiency.