41results about How to "Increase the output signal amplitude" patented technology

It is an object to suppress deterioration in characteristics of a transistor in a driver circuit. A driver circuit includes a first transistor, a second transistor including a gate and one of a source and a drain to which a second signal is inputted, a third transistor whose gate is electrically connected to one of a source and a drain of the first transistor and which controls whether a voltage state of an output signal is set or not by being turned on / off, and a fourth transistor whose gate is electrically connected to the other of the source and the drain of the second transistor and which controls whether a voltage state of an output signal is set or not by being turned on / off.

The invention relates to a waterproof coding device having a built-in magnet disc. The waterproof coding device having the built-in magnet disc comprises the magnet disc, a turn button with a shaft, an induction circuit board, a positioning shaft, and a circular support seat, wherein an inner top face of the turn button is provided with an elastic positioning sheet, a port portion of an annular chamber at an outer wall of the turn button is provided with a magnetic guide ring, the magnet disc is mounted at a central portion of the positioning shaft, the induction circuit board is fixed at a tail portion of the positioning shaft, an outer circumferential wall of the circular support seat is provided with a positioning groove, a central portion of the circular support seat is provided with a shaft sleeve, the circular support seat is on a panel, a head portion of the positioning shaft penetrates through a mounting hole of the panel, thread connection with the positioning shaft is realized through a screw, the turn button is mounted on the support seat, the shaft is in moving matching with the shaft sleeve in the support seat, and the magnetic guide ring is attracted by a magnet of the magnet disc to realize synchronous rotation of the magnet disc and the turn button. The magnet disc is arranged in the casing panel, axial positioning of the turn button is realized through magnetic force of the magnet disc, the waterproof coding device has advantages of compact structure, waterproof performance, anti-shock performance and low cost and is especially applicable to use in a high wet environment or an easy shocking occasion.

A level converter includes a first to fourth transistors formed of a semiconductor having a same conductivity type. The first transistor is connected between a first power supply and a second output terminal, the second transistor is connected between a second power supply and a first output terminal, the third transistor is connected between the first power supply and the first output terminal, the fourth transistor is connected between the second power supply and the second output terminal, the first and the second transistors are input with one of first differential signals and the third and the fourth transistors are input with another of the first differential signals.

In a known fully-differential amplifier, it has been difficult to set a power voltage VDD to a low level while maintaining the signal amplitude and increase the amplitude of an output signal without increasing the power voltage VDD. The present invention provides a fully-differential amplifier including a voltage-current conversion unit, a first current-voltage conversion unit, and a second current-voltage conversion unit, where a resistance element included in the voltage-current conversion unit, a resistance element included in the first current-voltage conversion unit, and a resistance element included in the second current-voltage conversion unit are connected in parallel with one another.

The invention provides an inner conical elastomer for a strain force transducer. The inner conical elastomer comprises a cylindrical base body; the upper part of the base body is provided with a conical concave part; the bottom of the conical concave part is provided with a central hole; and the conical surface of the conical concave part is provided with a strain gauge. The optimization method for the elastomer comprises the following steps of: estimating an initial size; calculating stress of the elastomer under the action of the axial force of a bolt by a finite element method, and adjusting the cone angle of a model until stress on the inner conical surface is distributed uniformly; adjusting the thickness of the base body under the condition of not changing the cone angle to ensure that the stress level on the conical surface meets the requirement; and rounding the model size obtained through finite element calculation, wherein the rounded model size is used as the final size of the elastomer. The inner conical elastomer is a simple revolution solid, and is high in processing and heat treatment manufacturability; the stress of the adhesion part of the strain gauge is distributed uniformly; and the accuracy of the adhesion position of the strain gauge is not required. The axial size of the elastomer is smaller than that of a spoke elastomer, and the elastomer is more suitable for measuring the axial force of the bolt.

The present invention discloses a method and an apparatus for driving a digital loudspeaker based on amplitude modulation and phase modulation. The method comprises the steps of: performing modulation processing for a sound source signal to generate (2L+1) coded signals x at a level grade; performing selection processing for the coded signals x and a feedback vector signal b of M channels to generate a state vector signal s of the M channels, and then performing amplitude modulation processing for the state vector signal s to generate an amplitude modulation vector signal a of the M channels; performing shaping processing for the amplitude modulation vector signal a to generate a next feedback vector signal b of the M channels; performing phase modulation processing for the state vector signal s to generate a driving vector signal p of the M channels; and achieving electro-acoustic conversion of the driving vector signal p through a power amplification driving multichannel power amplifier and energy transducer unit. The method and the apparatus of the present invention can simultaneously adjust amplitudes and phases of various channels, thereby achieving better spatial domain directivity.

The invention relates to a B-dot probe blocking electrons of a magnetically insulated sheath and a current space distribution measuring system. The B-dot probe comprises a magnetic induction coil, a cable connector and a supporting and fixing device, wherein the magnetic induction coil is wired on a circuit board clockwise or anticlockwise in the same direction to form a PCB type magnetic induction coil; and the supporting and fixing device comprises a metal clasp and a metal support ring, and a stepped hole is formed at the position, just facing the top of the PCB type magnetic induction coil, at the top of the metal clasp. An insulated slice of high-molecular material is arranged in the stepped hole and fixedly connected with the metal clasp, when the B-dot probe is bombarded by electrons of the sheath of a magnetically insulated transmission line, the electrons are blocked by the insulated slice, and energy of the electrons is accumulated in the insulated slice.

A pulse wave measuring device is provided with a plurality of pulse wave measuring units. Each pulse wave measuring unit has a supporting member to which a beam of a pressure measuring device is attached. Contact portions at the distal end of the beam is in contact with the patient's arm, so that piezoelectric elements mounted on the beam measures the stress variation according to pulsation of the patient's radial artery. The supporting meter has two pressing legs between which the contact portions of the beam are situated. The distal ends of the pressing legs are also pressed against the patient's arm. The pressing legs are harder than the radial artery. The interval between the pressing legs can be altered by handling a micrometer head. The contact portions are situated back from the distal ends of the pressing legs.

The invention provides an anti-corrosion tonotransducer and a manufacture method thereof and a tension measuring system. The tension measuring system comprises a closed shell with containing space, the inner portion of the shell is provided with a two-hole cantilever beam, the two ends of the shell are respectively connected with a dismountable measuring rod and fixing rod extending out of the shell, two sets of strain gages respectively sticks to the two sides of the two-hole cantilever beam, and the two-hole cantilever beam is embedded in an amplifying device and sealed. A technology of 'active amplification, two-hole cantilever beam and high-precision strain gage' is adopted, the dismountable measuring rod with an anti-infiltration silicone rubber ring is designed, thereby the sensitivity, long-term stability, linearity, repeatability and other properties of the tonotransducer are greatly improved, the detection precision of biological signals is significantly improved, so that experimental data is more accurate and reliable, and the experimental success rate and teaching effect are further improved.