摘要:
A voltage controlled oscillator (VCO) comprising a first supply node, a second supply node, an oscillation transistor, a biasing network, an output node and a feedback network is described. The VCO is be powered by a supply voltage applied across the first and second supply nodes. The oscillation transistor and the biasing network are connected in series between the first supply node and the second supply node. The output node is connected to the oscillation transistor so as to deliver an oscillatory output signal. The feedback network provides an oscillatory feedback signal from the output node to the biasing network. The feedback network comprises a capacitive element and a transmission line connected in series for transferring the feedback signal. The VCO may be integrated in a radar device, for example.
摘要:
Systems and methods are provided for authenticating an input on a touch screen. A method comprises obtaining one or more pressure metrics for an input by a user on a touch screen that is being proffered as that of a known user. Each pressure metric corresponds to a pressure applied to the touch screen by the user at a respective impression location of the input. The method further comprises authenticating the user as the known user based at least in part on the one or more pressure metrics.
摘要:
A touch-screen display apparatus, the apparatus may include first and second sheets having opposed major surfaces and a size and shape defined by a periphery. The periphery may be defined by opposed ends and opposed edges. The first and second sheets may each have a conductive pattern including a pair of opposed busbars and a plurality of traces electrically coupled to, and extending between, corresponding pairs of opposed busbars. The transparent force sensing (TFS) sheet may have opposed major surfaces and a variable resistance which is related to a force exerted upon one or more of its major surfaces. The TFS sheet may be situated between the first and second sheets. The apparatus may also include one or more separation portions situated between the TFS sheet and the first or second sheet to bias the TFS sheet apart from the first or second sheet.
摘要:
A light-emitting device, comprising: a cover (1), a heat sink (2) and a light-emitting assembly (3), wherein the heat sink (2) has at least one first locking part (a), the cover (1) has at least one second locking part (b) corresponding to the first locking part (a), the second locking part (b) engages with the first locking part (a) to form an enclosed cavity (5) for the light-emitting assembly (3), and the second locking part (b) has a pressing part (b1) pressing the light-emitting assembly (3) against the heat sink (2).
摘要:
The disclosure relates to a displacement sensing touch panel and a touch screen using the touch panel. The touch panel includes a first panel, a second panel, and a displacement sensor sandwiched between the first panel and the second panel. The displacement sensor deforms when a pressure is applied to the first panel. The touch screen includes the touch panel, a controller where the touch positions and forces applied are deduced from the readings of the displacement sensor, and a display coupled to the controller and adjacent to the touch panel. Displacement information is collected through the displacement sensor to deduce the positions and magnitudes of the forces applied to the first panel of the touch panel or touch screen.
摘要:
A method and device for force sensing gesture recognition includes a processor, a motion detector, and a force detector. A motion detector senses a motion of the mobile device corresponding to a gesture and generates gesture data, the gesture data indicative of a command to be executed. A force sensor senses a magnitude of applied force and generates force data. The magnitude of applied force is indicative of a mode in which the command is to be executed. The processor is coupled to the motion detector and the force sensor. The processor executes the command as a function of the gesture data and the force data.
摘要:
A push-push oscillator circuit with a first oscillation branch with a first active device and a first tank adapted to provide a signal having a fundamental frequency f0, a second oscillation branch with a second active device and a second tank symmetrical to the first oscillation branch and adapted to provide a signal having the fundamental frequency f0. Output branches are coupled to the first oscillation branch and the second oscillation branch to provide signals having the second harmonic frequency 2f0 of the fundamental signal based on the signals having the fundamental frequency f0 and/or to provide signals having the fundamental frequency f0; The push-push oscillator circuit further comprises at least one terminal branch with a terminal adapted to provide a component of a differential signal having the second harmonic frequency 2f0 or the fundamental frequency f0. The at least one terminal branch comprises a RF stub.
摘要:
A voltage-controlled oscillator circuit comprises an output terminal for providing an oscillatory output signal thereat, a first inductor, a varactor, and a negative-resistance element. The varactor's capacitance is a function of a tuning potential applied at a first terminal of the varactor. A bias branch is present for coupling a second terminal of the varactor to a bias potential. The bias branch comprises a second inductor or a transmission line. The bias branch may comprise a transmission line the length of which is one quarter wavelength associated with the resonance frequency of the voltage-controlled oscillator circuit. A radar system including a VCO circuit is further disclosed.
摘要:
A user-friendly multi-layer micro/nanofluidic flow device and micro/nano fabrication process are provided for numerous uses. The multi-layer micro/nanofluidic flow device can comprise: a substrate, such as indium tin oxide coated glass (ITO glass); a conductive layer of ferroelectric material, preferably comprising a PZT layer of lead zirconate titanate (PZT) positioned on the substrate; electrodes connected to the conductive layer; a nanofluidics layer positioned on the conductive layer and defining nanochannels; a microfluidics layer positioned upon the nanofluidics layer and defining microchannels; and biomolecular nanovalves providing bio-nanovalves which are moveable from a closed position to an open position to control fluid flow at a nanoscale. The micro/nano fabrication process for fabricating a multi-layer micro/nanofluidic flow device can comprise: forming a conductive layer on a substrate; forming an electrode pattern; forming a nanofluidics layer with a nanochannel pattern to define nanochannels; forming a microfluidics layer with a microchannel pattern to define microchannels; and assembling the microfluidics layer on the nanofluidics layer. The micro/nano fabrication process can include: synthesizing a thin film of PZT on ITO glass, electron beam lithography, sputtering, spin-coating, photolithography, and plasma treatment.
摘要:
A voltage controlled oscillator circuit comprises a VCO resonator circuit having a first plurality of varactors for varying a frequency of the VCO resonator circuit the VCO resonator circuit being symmetrical with respect to VCO circuit ground and providing a signal having a frequency, the frequency depending on a tuning voltage applied to the first plurality of varactors, and a second plurality of varactors for compensating a drift of the frequency depending on a compensation voltage, a temperature sensor circuit sensing an ambient temperature of the VCO resonator circuit and providing a temperature dependent signal, and a temperature compensation circuit providing the compensation voltage depending on the temperature dependent signal. Furthermore, a phase locked loop (PLL) circuit, an automotive radar device and a method for compensating a frequency drift of a VCO resonator circuit are presented.