Ultrasonic receiver with adjustable signal reception sensitivity
A signal receiving and ultrasonic technology, applied in ultrasonic/sonic/infrasonic transmission systems, electrical components, transmission systems, etc., can solve the problems of high energy consumption, complex structure, and inability to adjust the sensitivity of signals, etc., to achieve simple structure and energy consumption low effect
Inactive Publication Date: 2015-05-06
CHENGDU MOBO NETWORK TECH
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Problems solved by technology
The near-field payment system using the traditional ultrasonic receiver cannot adjust the sensitivity of the received signal according to the strength of the signal. The traditional ultrasonic receiver also has the disadvantages of complex structure and high energy consumption.
Method used
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Embodiment Construction
[0009] The present invention will be further described below in conjunction with accompanying drawing:
[0010] Such as figure 1 As shown, the present invention is an ultrasonic receiver with adjustable signal receiving sensitivity, including the first resistor R1 to the sixteenth resistor R16, the first triode VT1, the second triode VT2, the ultrasonic receiver UW, the first The capacitor C1 to the eighth capacitor C8, the first integrated operational amplifier IC1, the second integrated operational amplifier IC2, the potentiometer RP, the first diode D1 and the second diode D2, and the power supply voltage input terminals are respectively connected to the first resistor R1 The first end of the second resistor R2, the positive power supply end of the first integrated operational amplifier IC1, the first end of the sixth resistor R6, the first end of the sixteenth resistor R16, the fourteenth resistor R14 The first end is connected to the first end of the tenth resistor R10, ...
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The invention discloses an ultrasonic receiver with adjustable signal reception sensitivity. The ultrasonic receiver comprises first to sixteenth resistors, a first triode, a second triode, an ultrasonic receiver, first to eighth capacitors, a first integrated operational amplifier, a second integrated operational amplifier, a potentiometer, a first diode and a second diode, wherein the supply voltage input end is respectively connected to the first end of the first resistor, the first end of the second resistor, the anode power end of the first integrated operational amplifier, the first end of the sixth resistor, the first end of the sixteenth resistor, the first end of the fourteenth resistor and the first end of the tenth resistor. According to the ultrasonic receiver with adjustable signal reception sensitivity, the gains of the integrated operational amplifiers can be adjusted through adjusting the potentiometer in a circuit of the ultrasonic receiver, so that sensitivity of the ultrasonic receiver is adjusted.
Description
technical field [0001] The invention relates to an ultrasonic receiver, in particular to an ultrasonic receiver with adjustable signal receiving sensitivity. Background technique [0002] The ultrasonic receiver converts and amplifies the received signal into a certain output signal. Ultrasonic is one of the media in the near-field payment system, and the near-field payment system with ultrasonic as the medium is equipped with an ultrasonic receiver. Near-field payment refers to the local communication between mobile phones and terminal devices such as vending machines and POS machines through radio frequency, infrared and Bluetooth channels. The near-field payment system using the traditional ultrasonic receiver cannot adjust the sensitivity of the received signal according to the strength of the signal. The traditional ultrasonic receiver also has the disadvantages of complex structure and high energy consumption. Contents of the invention [0003] The object of the pre...
Claims
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Inventor 唐皓
Owner CHENGDU MOBO NETWORK TECH