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Invention Publication
CN104660172A 一种用于多媒体数字播放系统的高精度频移解调器 无效 - 撤回

一种用于多媒体数字播放系统的高精度频移解调器
Abstract:
本发明公开了一种用于多媒体数字播放系统的高精度频移解调器，包括电源、JK触发器、宽频带放大器、第一电阻至第九电阻、第一电容至第四电容、第一与非门电路至第四与非门电路、第一电位器、第二电位器、第一二极管和第二二极管，第一与非门电路、第二与非门电路、第三与非门电路、第四与非门电路、第一电容、第二电容、第二电阻、第一电阻和第一电位器组成单稳态多谐振荡器。本发明的第一与非门电路、第二与非门电路、第三与非门电路、第四与非门电路、第一电容、第二电容、第二电阻、第一电阻和第一电位器组成单稳态多谐振荡器，单稳态多谐振荡器能提高该频移解调器解调信号的精度，且能使解调信号的频率范围更大。
Abstract(English):

The invention discloses a high-accuracy frequency shift demodulator for a multimedia digital playing system. The frequency shift demodulator comprises a power supply, a JK trigger, a broadband amplifier, first to ninth resistors, first to fourth capacitors, first to fourth NAND gate circuits, a first potentiometer, a second potentiometer, a first diode and a second diode, wherein the first NAND gate circuit, the second NAND gate circuit, the third NAND gate circuit, the fourth NAND gate circuit, the first capacitor, the second capacitor, the second resistor, the first resistor and the first potentiometer form a monostable multivibrator. According to the frequency shift demodulator, the first NAND gate circuit, the second NAND gate circuit, the third NAND gate circuit, the fourth NAND gate circuit, the first capacitor, the second capacitor, the second resistor, the first resistor and the first potentiometer form the monostable multivibrator, and by the monostable multivibrator, the accuracy of a demodulated signal of the frequency shift demodulator can be improved, and the frequency range of the demodulated signal is wider.

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