Abstract: Authorization management and authorization requesting for an elevator service request, and belongs to the field of elevator management technologies. An authorization management apparatus for an elevator service request according to the present invention comprises: a receiving unit configured to receive authorization request information from one or more personal mobile terminals, wherein the authorization request information comprises an elevator identifier of a corresponding elevator of an elevator system acquired by a corresponding personal mobile terminal and a terminal identifier of the personal mobile terminal mapped to the elevator identifier; and an authorization management unit configured to determine, at least according to a mapping relationship between the elevator identifier and the terminal identifier in the authorization request information, whether the authorization request information from the corresponding personal mobile terminal is allowed to be authorized.

Abstract: A display panel, including an active area and a peripheral area, which is located outside of the active area, wherein the active area comprises a base substrate, and a display structure layer and a touch structure layer sequentially arranged on the base substrate; the peripheral area includes an isolation dam, a first ground trace and a second ground trace arranged on the base substrate; and the first ground trace is located at a side of the isolation dam close to the active area, and the second ground trace is located at a side of the isolation dam away from the active area.

Abstract: A chip type coil-based fluxgate current sensor, comprising: a magnetism gathering iron core, a chip type coil, an integral filtering module, a signal driving module, a voltage acquisition module, and a signal amplification module which are connected in sequence. The chip type coil comprises a first high-resistance silicon wafer and a second high-resistance silicon wafer which are bonded with each other; a built-in cavity is formed between involution surfaces of first high-resistance silicon wafer and second high-resistance silicon wafer, and multiple solenoid cavities filled with coil materials are provided around the periphery of the cavity; a cavity opening is formed at one end after involution of first high-resistance silicon wafer and second high-resistance silicon wafer. The magnetism gathering iron core is inserted into the cavity of the chip type coil by means of the cavity opening. The present current sensor is small in size and stable in signal.

Abstract: A measurement circuit of thin-film temperature sensor comprises: out-phase input end and output end of first operational amplifier are connected to first end of thin-film resistor; first end of first resistor is connected to output end of first operational amplifier, second end of first resistor is connected to in-phase input end of first operational amplifier; second end of first resistor is grounded via second resistor; output end of second operational amplifier is connected to first end of potentiometer; second end of the potentiometer is connected to the constant current source and in-phase input end of second operational amplifier respectively; first end of third resistor is connected to output end of second operational amplifier, second end of third resistor is connected to out-phase input end of second operational amplifier; second end of third resistor is grounded via fourth resistor; voltage value of second end of potentiometer is output signal.

Abstract: A reconfigurable triplexer that can support more frequency bands than a traditional triplexer is disclosed. For example, the reconfigurable triplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the reconfigurable multiplexer can reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable triplexer includes a multi-stage filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the triplexer to support a variety of sets of frequencies. For instance, unlike traditional triplexers, the reconfigurable triplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A circuit for protecting a power amplifier includes a protection control circuit, an inter-stage adjustment circuit and a multi-stage power amplification circuit. The inter-stage adjustment circuit is connected in series between at least two adjacent power amplification circuits in the multi-stage power amplification circuit. The protection control circuit is configured to: control the inter-stage adjustment circuit to be in a turn-off state when overload protection of any stage power amplification circuit is enabled; and control the inter-stage adjustment circuit to be in a turn-on state, after a preset time elapses from the overload protection of the power amplification circuit being closed. In this way, damage of the power amplifier due to excessive input power may be avoided by the inter-stage adjustment circuit, thereby achieving a function of protecting the power amplifier.

Abstract: A protection circuit for the power amplifier includes a detection circuit, a controller and an input impedance adjustment circuit. The detection circuit is provided with an input end connected to the power amplifier and an output end connected to an input end of the controller, and is configured to detect an operation electrical signal of the power amplifier and generate a trigger electrical signal. The controller is configured to generate a first control signal and a second control signal, the first control signal is configured to control a bias current or bias voltage of the power amplifier to reduce or recover a gain of the power amplifier, and the second control signal is configured to adjust characteristic parameters of the input impedance adjustment circuit. The input impedance adjustment circuit is configured to decrease or increase input power of the power amplifier in response to the second control signal.

Abstract: A power amplifier circuit includes N-stage power amplifiers connected in series, provided with an input end receiving a RF input signal and an output end outputting a RF output signal. In the N-stage power amplifiers, an output end of N-M stage power amplifiers and an output end of a final stage amplifier are grounded through their respective frequency doubling suppression circuits which are configured to suppress frequency doubling of the N-stage power amplifiers during operation, and N is an integer greater than or equal to 2.

Abstract: A circuit for protecting an amplifier includes a detection circuit, a controller and a bypass impedance adjustment circuit. The detection circuit is configured to detect an operation electrical signal of a power amplifier and generate a trigger electrical signal based on the operation electrical signal correspondingly. A first output end of the controller is connected to a base or a gate or a bias circuit of the power amplifier, and a second output end of the controller is connected to a control input end of the bypass impedance adjustment circuit. The bypass impedance adjustment circuit is connected in parallel with the power amplifier. The controller is configured to generate a first control signal and a second control signal based on the trigger electrical signal, and the first control signal is configured to control a bias current or bias voltage of the power amplifier.

Abstract: A power control device includes: a controller configured to, when a frequency band selection instruction is detected, determine a target frequency band from the frequency band selection instruction in response to the frequency band selection instruction; and to determine, based on the target frequency band, a target inter-stage matching circuit of a path from a plurality of inter-stage matching circuits; a driving element configured to, when an input power signal within the target frequency band is received, pre-amplify the input power signal to obtain a pre-amplified power signal and transmit the pre-amplified power signal to the target inter-stage matching circuit; the target inter-stage matching circuit configured to process the pre-amplified power signal to obtain an intermediate input signal and provide the intermediate input signal to a power stage amplification circuit; the power stage amplification circuit configured to amplify the intermediate input signal to obtain an output power signal.

Abstract: In some embodiments, a front-end system can include a switch network that includes an antenna node, a first signal node connectable to a first filter-based assembly for a first band, a second signal node connectable to a second filter-based assembly for a second band, and a third signal node connectable to a third filter-based assembly for a third band. The switch network can be configured to support carrier aggregation of at least the first and second bands. The front-end system can further include a reconfigurable routing circuit configured to allow carrier aggregation of the third band and a selected one of the first and second bands utilizing the third filter-based assembly and the filter-based assembly associated with the selected one of the first and second bands.

Abstract: A reconfigurable triplexer that can support more frequency bands than a traditional triplexer is disclosed. For example, the reconfigurable triplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the reconfigurable multiplexer can reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable triplexer includes a multi-stage filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the triplexer to support a variety of sets of frequencies. For instance, unlike traditional triplexers, the reconfigurable triplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A reconfigurable triplexer that can support more frequency bands than a traditional triplexer is disclosed. For example, the reconfigurable triplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the reconfigurable multiplexer can reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable triplexer includes a multi-stage filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the triplexer to support a variety of sets of frequencies. For instance, unlike traditional triplexers, the reconfigurable triplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A power control device includes: a controller configured to, when a frequency band selection instruction is detected, determine a target frequency band from the frequency band selection instruction in response to the frequency band selection instruction; and to determine, based on the target frequency band, a target inter-stage matching circuit of a path from a plurality of inter-stage matching circuits; a driving element configured to, when an input power signal within the target frequency band is received, pre-amplify the input power signal to obtain a pre-amplified power signal and transmit the pre-amplified power signal to the target inter-stage matching circuit; the target inter-stage matching circuit configured to process the pre-amplified power signal to obtain an intermediate input signal and provide the intermediate input signal to a power stage amplification circuit; the power stage amplification circuit configured to amplify the intermediate input signal to obtain an output power signal.

Abstract: A reconfigurable triplexer that can support more frequency bands than a traditional triplexer is disclosed. For example, the reconfigurable triplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the reconfigurable multiplexer can reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable triplexer includes a multi-stage filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the triplexer to support a variety of sets of frequencies. For instance, unlike traditional triplexers, the reconfigurable triplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A reconfigurable triplexer that can support more frequency bands than a traditional triplexer is disclosed. For example, the reconfigurable triplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the reconfigurable multiplexer can reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable triplexer includes a multi-stage filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the triplexer to support a variety of sets of frequencies. For instance, unlike traditional triplexers, the reconfigurable triplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A method of dynamically configuring a multiplexer that can support more frequency bands than a traditional multiplexer is disclosed. For example, the reconfigurable multiplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the method enable the multiplexer to reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable multiplexer includes a filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the multiplexer to support a variety of sets of frequencies. For instance, unlike traditional multiplexers, the reconfigurable multiplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A reconfigurable multiplexer that can support more frequency bands than a traditional multiplexer is disclosed. For example, the reconfigurable multiplexer can handle frequencies of several hundred megahertz up to 10 gigahertz. Further, certain implementations of the reconfigurable multiplexer can reduce or eliminate frequency dead zones that exist with traditional multiplexers. The reconfigurable multiplexer includes a filter bank capable of supporting a number of frequency bands and a bypass circuit that enables the multiplexer to support a variety of sets of frequencies. For instance, unlike traditional multiplexers, the reconfigurable multiplexer can support both frequency bands with relatively narrow spacing and frequency bands with relatively wide spacing. Further, the inclusion of the bypass circuit enables the reduction or elimination of dead zones between supported frequencies.

Abstract: A pressure sensing device includes an elastic tube defming a chamber and an opening in one or each of two opposite ends thereof in communication with the chamber, and a pressure sensor component sealed in the opening in one or each end of the elastic tube for detecting a change in air pressure in the chamber when the elastic tube is compressed by an external pressure. The pressure sensing device can be used under a waterproof or dustproof environment, or embedded in a bed mattress or seat cushion and incorporated with a signal processor for detecting changes in the biophysical condition of the user, or embedded in a floor mat and incorporated with light and/or sound generating device for reminding your home or store that someone is coming in or going out. Thus, the pressure sensing device has the characteristics of simple structure, practical applicability and wide application range.

Abstract: A light control type key switch assembly includes multiple key switch units each including a key switch holder and a key switch mounted in the key switch holder, multiple light receivers respectively mounted around one respective key switch holder, and a light-emitting unit including a light source and a light guide facing toward the light source and neighbored to each key switch holder for guiding the emitted light from the light source along a light path toward each light receiver. When the key switch is not pressed, the plunger of the respective key switch is kept away from the light path, and thus no electrical signal will be generated. When the key switch is pressed, the plunger of the respective key switch enters the light path, causing an electrical signal output.