Generally, the high-power (5-15W) cordless telephones produced in the past few years, the working frequency band is about 76MHz, and most of them use crystal oscillators + C2053 + C1971 (or Mitsubishi mother sucking down the β-Sinuo 竽? â’Œ é«Œ 打 ⑸ æµ ? Shallow 7 Award Paradox? Thanks? Just ⑸ æ·¦ bottom base, power supply, etc. are integrated together, replace the related resonance circuit parameters and change the crystal oscillator to the ordinary three-point type (or add PLL) It has become a finished transmitter. Now most of these cordless telephone landlines have been eliminated. Everyone going to the second-hand electrical appliance market to find gold will definitely gain something.
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[Photo] High-power switching power supply ![[Photo] High-power switching power supply]()
Published on 2006-04-15 23:25 • 364 times read
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