摘要
针对现有超声波接收电路前级放大结构复杂、噪声较大、成本较高的缺点,提出了一种基于调频、调幅中频放大器AN7218的超声波接收电路。通过FM与AM中频放大器对超声传感器的回波信号进行低噪声前置放大,电路适用于各种中频超声波接收电路。实验表明,电路设计简单、性能稳定、价格低廉,具有广阔的应用前景。
Considering the disadvantages of present ultrasonic receiver circuit, such as complex structure, noisy, higher costs and put forward an ultrasonic receiver circuit based on FM-AM IF amplifier AN7218. The design achieves ultrasonic receiver signal low-noise preamplifier by FM-AM IF amplifier. The design system adopts various types of ultrasonic receiver circuit which is inter mediate frequency. The experiment shows the circuit has extremely simple, stable performance, low prices, and will have a broad application prospect.
出处
《电子技术应用》
北大核心
2013年第8期91-94,共4页
Application of Electronic Technique
