114results about How to "Reduced Linearity Requirements" patented technology

A touch sensor integrated type display device includes gate lines and data lines disposed to cross over each other, pixel electrodes respectively disposed in areas defined by the crossing of the gate lines and the data lines in an active area, 1-1 electrodes arranged in at least two rows and at least two columns in the active area, 1-2 electrodes positioned outside the 1-1 electrodes and extending from the active area to a bezel area, and first routing wires respectively connected to the 1-1 and 1-2 electrodes and arranged in parallel. Each gate line extends from the active area to the bezel area on opposite sides of the active area, and each data line extends from the active area to the bezel area on opposite sides of the active area crossing the gate line.

The dynamic range is changed by switching a current applied to an amplifying circuit to obtain the minimum ICP required to keep linearity with the number of multiplexes even when the number of multiplexes of data is changed by switching the operation current of the amplifying circuits of the transmission system and also supplying the information about number of multiplexes of data to be transmitted to the amplifying circuits of the transmission system from the baseband circuit. Thereby, the signal can be transmitted without distortion even when the number of multiplexes increases and the current of the amplifying circuit may be reduced when the number of multiplexes is small in order to reduce the current consumption in the communication semiconductor integrated circuit device which can form a wireless communication system of the code division multiplex system such as W-CDMA system.

The present invention provides the method and system of a Time Division Multiplexing which makes use of a number of symbols in the time domain transmitting data sequence in parallel. The method includes: the transmitting terminal forms the transmission signals which are overlapped by a number of symbols in the time domain, and the receiving terminal does data sequence detection in the time domain for the received signals according to the one-to-one relationship between the transmission data sequence and the time waveform of the transmission data sequence. In addition, the present invention also provides a kind of Time Division Multiplexing system based on the above method of the Time Division Multiplexing. The present invention makes actively use of these overlapping to produce the coding constraint relation, thus the spectral efficiency of the system is improved by a large margin. In random time-varying channel, with reasonable arrangement, the transmission reliability of the system can also be improved at the same time, and at the same threshold, Signal Interference Ratio and its spectral efficiency are far higher than those of the high-dimension modulation and other technologies. At the same spectrum efficiency, the number of the total levels of its systems and the needed threshold Signal Interference Ratio are also reduced significantly than those of the high-dimension modulation and other technologies.

Variable gain low noise amplifier (LNA) system to reduce linearity requirements on a radio receiver. In the receiver, the LNA is coupled to receive an RF signal and produce an amplified signal at an LNA output. The receiver also comprises a VGA coupled to the LNA output to receive the amplified signal and produce a VGA output to downstream components of the receiver. The receiver also comprises a control network coupled to the LNA and the VGA. The control network operates to adjust gain factors of the continuously variable LNA and the VGA based on a received power indicator of the RF signal, so that a signal-to-noise ratio required for demodulation of the RF signal is met with a selected margin and the linearity requirements of the receiver are reduced.

The present invention relates to a low power consumption receiver which can dynamically detect the blocking interference signal and belongs to the technical field of wireless communication. The receiver comprises the following components: a radio frequency amplifier, a frequency synthesizer, a first frequency mixer, a low-pass filter, a variable gain amplifier and an analog-digital converter which are connected in sequence. The receiver also comprises a blocking interference signal detector and a system configuration regulator connected with the detector. The input end of the blocking interference signal detector can be connected with the output end of the analog-digital converter, and can be connected with the input ends and output ends of the low-pass filter and variable gain amplifier at the same time. The output end of the system configuration regulator is connected with at least one device in all devices respectively, or is connected with a plurality of receiving chains which arecomposed of the devices through an N-route multiplexer. The receiver presented by the invention can automatically detect the strength of the blocking interference signal and regulates the system configuration correspondingly. The receiver is leaded to work in different working modes in order to adapt different working environments.

The invention belongs to the technical field of rotating machinery detection and in particular relates to a torque change measurement device and method for detecting the rotating machinery in the operation process. The torque measurement device comprises magnets (2), inductive transducers (3), a signal conditioning module (4), an acquisition module (5) and a computer processing system (6). The torque measurement method comprises the following steps: 1) selecting two measuring points; 2) installing the torque measurement device; 3) acquiring an unloaded initial signal; 4) acquiring a loaded turn signal; and 5) computing the torque of the shaft to be measured. The invention is convenient and simple to install, easy and practical to operate and high in measurement precision, has no requirement for installation precision, basically dispenses with adjustment, can greatly save the measurement preparation time, simultaneously has low requirement for the linearity of the sensor, saves cost and can be widely applied to the field of rotating machinery monitoring and diagnosis.

The invention discloses a low peak-to-average ratio wireless light transmission method with clipping moving. The feature that one of paring signals in ACO-OFDM time domain signals must be zero is utilized, if a positive signal in the pairing signals exceeds the set threshold value, clipping is conducted on the positive signal, and the clipped quantity is put at the zero position in the paring signals, and therefore the function of reducing the PAPR is achieved. The low peak-to-average ratio wireless light transmission method is easy to achieve, the PARP of an ACO-OFDM wireless optical communication system can be effectively reduced, system power consumption is reduced, the requirement for the linearity of a power amplifier and an LED lamp is lowered, nonlinear distortion of the signals in electricity and light domains is reduced, and therefore the receiving performance of the system is improved.

A radio frequency receiver includes an amplifier and a detector that produces a bias control signal based on a signal environment. A bias level of the amplifier is set according to the bias control signal. Bias levels other receiver circuits may have similarly adjusted bias levels, including buffers, IF oscillators, mixers, and converters. The invention can be used to increase range of linearity, intermodulation immunity and reduce power consumption by reducing the bias level under typical conditions and relying on the bias control to increase bias levels under adverse signal conditions. The invention has advantages where power is at a premium, particularly when a device is in standby mode, including mobile, portable and hand held pagers and wireless telephones and Internet connections. If standby mode operation in non-maximum signal environments dominates the usage of the receiver, then the invention can substantially increase battery life.

The invention discloses a method for realizing co-frequency full duplex wireless communication, which belongs to the field of wireless communication, aims to overcome defects of two basic duplex methods,namely, frequency division duplex (FDD) and time division duplex (TDD), of wireless communication, that is, FDD occupies wide frequency band and TDD is low in time availability, and consequentially realizes co-frequency full duplex wireless communication. According to the invention, both parties involved in communication have same signal band, receive and transmit signals simultaneously; angle modulation is taken as a signal modulation manner, and a sent radio-frequency signal is taken as a local oscillation signal of a receiver; the coherent reception technology is adopted for separating transceiving signals in the same frequency band; and a series of technologies including direct frequency conversion, signal offset, DC removal and adaptive filtering are combined to realize the purpose of co-frequency full duplex wireless communication. The method can be used for miniwatt bothway wireless communication.

An object of the present invention is to provide a method for manufacturing electrodes that can effectively suppress edge-curl when metal electrodes such as bus electrodes and data electrodes are patterned mainly by a photolithography method.

In order to achieve the above object, in the manufacturing method in the present invention, an amount of undercut generated by difference in a degree of dissolution caused by developing solution is controlled, and baking is performed at a temperature such that glass in a protrusion formed at side edges becomes soft so as to touch a substrate by gravity. With such method for manufacturing, it becomes possible to make the side edges rounded whose curvature changes continuously.

A wafer processing method divides a wafer into a plurality of individual devices along a plurality of crossing division lines formed on the front side of the wafer. The method includes a functional layer removing step of applying a CO₂ laser beam to the wafer along each division line with the spot of the CO₂ laser beam, having a width corresponding to the width of each division line set on the upper surface of each division line, thereby removing a functional layer along each division line to form a groove along each division line where the functional layer has been removed, and a groove shaping and debris removing step of applying a laser beam having a wavelength in the ultraviolet region to the wafer along each groove, thereby removing debris sticking to the bottom surface of each groove and also shaping the side walls of each groove.

The invention discloses a fully-integrated anti-blocking radio frequency receiving front-end architecture. The fully-integrated anti-blocking radio frequency receiving front-end architecture comprises a blocking signal filtering stage and a down mixing stage. The blocking signal filtering stage is a feed-forward structure, and a main branch and a feed-forward branch use low-noise amplifiers with the same circuit structures to realize matching. The feed-forward branch uses the impedance moving feature of a passive mixer at the frequency domain, a band elimination filter is generated at a radio frequency local oscillator to filter useful signals, and then a usable radio frequency signal is obtained through subtracting the obtained blocking signal from the blocking signal of the main branch. Because the blocking signal is directly filtered after two low-noise amplifiers, the influence on the other circuit is avoided, and the other non-ideal factors are avoided. The down mixing is realized to obtain a usable middle-frequency signal through connecting the passive mixer.

Disclosed is a burst communication system utilizing transient peak energy. A transmitter adopts a simplified expanded binary phase shift keying modulation mode, a receiver comprises a receiving antenna, the receiving antenna is connected with an analog receiver, the analog receiver is connected with an analog-to-digital converter, the analog-to-digital converter is connected with an EBPSK (expanded binary phase shift keying) digital modulator, and the EBPSK digital modulator is connected with a frame processor; the analog receiver comprises a pre-amplifier, the pre-amplifier is connected with a frequency mixer, and the frequency mixer is connected with an intermediate-frequency amplifier; and the EBPSK digital modulator comprises a digital impacting filter, the digital impacting filter is connected with a preprocessor, the preprocessor is connected with a return-to-zero decision device, the return-to-zero decision device is connected with a delay calculation module, both the delay calculation module and the preprocessor are connected to a variable delayer, the variable delayer is connected with an integration decision device, the return-to-zero decision device is further connected with a clock generator, the clock generator is connected to the integration decision device, and a frequency synthesizer is respectively connected to the frequency mixer and the clock generator.

The present invention provides a transmission method which generates and sends a transmission signal generated from a multiplexing OFDM signal or a multiplexing wavelet-OFDM signal employing a multiplexing-spread chip sequence in which a chip of a code sequence for spread and a code sequence for combination, and a chip of a code sequence for localization are multiplied and multiplexed, and a receiving method which makes a high SN ratio improvement rate possible by converting the received signal to a frequency domain to acquire the multiplexing-spread chip sequence and by performing de-spreading and localizing processing to detect a localized pulse. According to the data transmission using the transmission and receiving method, data is mapped into a code sequence, and the receiving side can detect the data as the kind of code sequence, the shift time of a localized pulse and the polarity at a high SN ratio improvement rate. Further, when used in a measuring system, the transmission and receiving method can obtain information associated with an object to be measured on the basis of the aspect and the characteristics of a localized pulse by calculating the localized pulse from a signal detected from the object to be measured at a high SN ratio improvement rate.

An air germicidal treatment device and system for removing or eliminating unwanted pathogens or bacteria in an airstream is shown. The device or system has a removable irradiation chamber that divides an interior area of the device into an air pre-chamber area, an air post-chamber area and an irradiation area therebetween. The removable irradiation chamber is generally trapezoidal in shape and has end walls that are inclined with respect to an interior divider wall.

A system, method, and computer-usable medium are presented for controlling viewing angle characteristics by performing a color palette gradation control of a liquid crystal display, such that adjustment effects on a viewing angle range are improved.

A power amplification module includes a first amplification transistor that receives a first signal outputs an amplified second signal from the collector thereof; and a bias circuit that supplies a bias current to the base of the first amplification transistor. The first bias circuit includes a first transistor that is diode connected and is supplied with a bias control current; a second transistor that is diode connected, the collector thereof being connected to the emitter of the first transistor; a third transistor, the base thereof being connected to the base of the first transistor, and the bias current being output from the emitter thereof; a fourth transistor, the collector thereof being connected to the emitter of the third transistor and the base thereof being connected to the base of the second transistor; and a first capacitor between the base and the emitter of the third transistor.