With increasing interest in Hi-Fi audio available in smartphones and headphones supporting"Hi-Res", it has become necessary to find solutions to the problems of degradation of reception sensitivity and voice distortion in audio lines.
Offering environment for throughput test and receiving sensitivity tests of wireless equipment in OTA(Over the Air)[Application] When performing OTA test of wireless equipment(hereinafter referred to as EUT), the correct evaluation is not possible by interference from around.
Supporting X-band frequency channel for deep space exploration EImprovement of ranging(means"measuring distance") link quality in deep space exploration EImprovement of receiver sensitivity EDigital signal processing in the base band section Considering these features, we call the new transponder the"X-band digital transponder.
This problem of degradation of reception sensitivity also arises due to noise from the headphone line. Further, noise suppression measures used so far in audio lines resulted in the problem of voice distortion caused by distortion in the audio signal waveform.
Incidentally, in the magnetic sheet for RFID offered by TDK as a different type of Flexield for noise suppression(to improve the reception sensitivity of the reader/writer in RFID systems), the real part μ' is required to be large, and the imaginary part μ'' is required to be small for the usage frequency of 13.56MHz.
Especially in multi-functional compact electronic devices with communication functions such as smartphones, with increasing density of the printed circuit board, the noise emission produced internally interferes with the antenna and causes a drop in reception sensitivity as well as a degradation in image and voice quality. A solution needs to be found for this problem of"self-poisoning" which is an EMC problem inside the device.
Customer benefits: Low NF, high linearity and low current consumption that enhances the signal receiving sensitivity and improves data transfer rate Have Pin-to-pin compatible families that products can easily be implemented in new project based on same PCB design Smallest package in the industry, increased system integration and reduce the product power consumption. No bond wires that avoid the interference caused by bond wires and further reduce the product dimension High linearity LNAs for use in transmit path MIMO systems.
Yang Zhixing, a professor at Tsinghua University and one of proponents of China digital terrestrial broadcasting standard, says:"Since technical cooperation between Tsinghua University and ROHM began in 2008 to develop a reception LSI(DTMB Demodulator) designed for Chinese digital terrestrial broadcasting, LAPIS Semiconductor(a subsidiary of ROHM Group) has achieved significant successes in quality, stability, receiver sensitivity and low power consuming performance for reception LSI.
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