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Design a component structure of an SOI microneic resonator. It is a waveguide with a width of 450 nm and a height of 220 nm. The light is in the range of 2.5 μm. It surrounds its waveguide with SiO2. In order to make the ring resonant cavity meet the phase matching conditions. The element uses a ring-to-waveguide coupling zone and adjusts the coupling parameters by changing the coupling pitch. In...
An Application-specific integrated circuit(ASIC) of special chip circuits are used in ultrasonic probe array systems. The circuit architecture is to calculate the output of the ultrasonic probe signal in two different periods of time. In the odd-even mode, the mode setting module arranges one of odd ones and even probes of the address parameters in numerical order, followed by the other one of the...
Blood flow measurement is based on the blood of hemoglobin to absorb light capacity. The sensors are made up of light sources and detectors placed close to each other, and are placed directly on the skin when measured. The emitted light penetrates into the skin, tissues and blood vessels, and then is absorbed, transmitted and reflected. The intensity of the reflected light recorded by the detector...
This paper describes the DNA microarray chips for disease detection and gene sequencing. It is combining imaging of DNA liquid jetting system. Its droplets are very small. It is only 50 to 60 microns. With the ASIC architecture circuit of the thermal bubble generation system, it can eject 432 DNA droplet points only 85µsec period.
A medical device for measuring psychological signals includes a substrate, a light emitting unit, a photoelectric sensor and a microprocessor. The substrate includes a surface that is divided into an emission area and a reception area. The light emitting unit is arranged in the emission area and includes a plurality of light emitting sections. Each of the plurality of light emitting sections includes...
This study is flex sensor for stroke patients identify the specific behavior with different bending situations. Experimental data show that most users tend to over-bending the muscles when the muscles are tired, then the LED will light up the warning user. This system is helpful for long-term users who need access to the stairs. It can reduce knee loss, increase the service life.
A low-power sensorless inverter controller is designed for brushless DC (BLDC) motors without using any Hall sensor. A back-EMF (back-electromotive force) estimation method is adopted to detect the commutation moment for rotation control of the brushless DC motors. The position of the rotor can be precisely estimated by measuring the back-EMF as well as the zero-crossing points. The proposed controller...
An implantable SOC chip for micro-stimulation and neural signal recording is presented. This work possesses a multi-parameter control protocol to provide different stimulation waveforms, for various pain treatments of muscles and stimulating applications. Additionally, the proposed SOC chip supports several transmission rates of RS232, which in turn provides a flexibility to be integrated in a variety...
This paper presents a novel IA (instrumentation amplifier) design for implantable biomedical devices and systems with a 140-dB CMRR (common-mode rejection ratio). The proposed IA is composed of 3 stages, including a preamplifier, a 2nd-order BPF (band-pass filer), and a DC-level shifter and output buffer stage. A low-noise gm-C amplifier is used in the preamplifier stage so as to reduce the coupled...
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