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BH1417是ROHM公司推出的新型FM无线发射芯片,它是由提高信噪比(S/N)的预加重电路、防止信号过调的限幅电路、控制输入信号频率的低通滤波电路(LPF)、产生立体声复合信号的立体声调制电路、调频发射的锁相环电路(PLL)等电路组成。文章给出了BH1417的结构、原理、特性。基于BH1417芯片,配以简单的外围电路,即可实现FM无线发射,具有高可靠性和极低的功耗。
The BH1417 is a new type of FM wireless transmitter chip launched by ROHM Corporation. It consists of a pre-emphasis circuit to improve signal to noise ratio (S / N), a limiter circuit to prevent signal over-regulation, a low pass filter circuit (LPF) to control the frequency of input signal, , To produce stereo composite signal of the stereo modulation circuit, FM transmitter phase-locked loop circuit (PLL) and other circuits. The article gives the structure, principle and characteristics of BH1417. Based on BH1417 chip, together with a simple peripheral circuit, you can achieve FM wireless transmitter, with high reliability and low power consumption.