Chi Mei Internet Technology Co. Shanxi brief intercom: RF amplified signal receiving portion will come from the PLL frequency synthesizer circuit of the first local oscillator signal from the mixer and generating a first intermediate frequency signal at the first mixer. The first intermediate frequency signal through the crystal filter to further eliminate clutter adjacent channel. After the first intermediate frequency signal into the filtered IF processing chip, and the second local oscillator signal to generate a second intermediate frequency signal is again mixed, the second intermediate frequency signal is filtered out unwanted spurious signals by a ceramic filter, is amplified and frequency discriminator, digital radio offer, generating an audio signal. Audio signal amplification, band-pass filter, de-emphasis and other circuits, to enter volume control circuit and power amplifier amplifies, Changzhi digital radio, drive a speaker to give people the information they need. Internet Technology Co., Ltd. Shanxi Chimei briefly intercom History: 1949 patent literature have described the first time a full range walkie symbols Norm Woodland and Bernard Silver invention, before the patent literature has not recorded walkie-talkie technology , nor put to practical use of precedent. Digital radio offer, Shanxi CMO Internet technology (certified), provided by the Shanxi Changzhi digital radio Internet Technology Co., Ltd. Chi Mei. Shanxi Chi Mei Internet Technology Co. (www.sxqmhl.com) (www.sxqmhl.com) is a leader in Taiyuan, integrated monitoring system, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. Internet Technology in Shanxi CMO leadership with the staff warmly welcome all inquiries negotiations to create the Shanxi CMO Internet technology better future.