Signal transmission amplification filter circuit for communication device
A signal amplification and filter circuit technology, applied in amplifiers, low-frequency amplifiers, audio amplifiers, etc., can solve problems affecting audio quality and achieve the effect of ensuring strength
Inactive Publication Date: 2017-06-16
马鞍山格尚智能装备有限公司
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Problems solved by technology
[0002] The only terminal audio circuit provided by the prior art will also amplify the harmonic signal while amplifying the signal, and output it together with the audio signal, affecting the output audio quality
Method used
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[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0011] An embodiment of the present invention provides a communication equipment transmission signal amplification and filtering circuit, which includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first Capacitor C1, second capacitor C2, third capacitor C3, first amplifier U1 and second amplifier U2;
[0012] One end of the first resistor R1 is connected to the audio analog signal...
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The invention provides a signal transmission amplification filter circuit for a communication device. One end of a first resistor is connected with an audio analog signal input end, the other end of the first resistor is connected with the reverse input end of a first amplifier, the forward input end of the first amplifier is connected with one end of a first capacitor, the other end of the first capacitor is connected with one end of a second resistor, the output end of the first amplifier is connected with one end of a third resistor and one end of a second capacitor, the other end of the second capacitor is connected with one end of a sixth resistor, the other end of the sixth resistor is connected with the other end of the third resistor, one end of a fourth resistor and the reverse input end of a second amplifier, the forward input end of the second amplifier is connected with one end of a third capacitor, the other end of the third capacitor is connected with one end of a fifth resistor, and the other end of the fourth resistor is connected with the output end of the second amplifier. The signal transmission amplification filter circuit filters out a harmonic part while amplifying audio signals.
Description
technical field [0001] The invention belongs to the technical field of intelligent terminals, in particular to a communication equipment transmission signal amplification and filtering circuit. Background technique [0002] The only terminal audio circuit provided by the prior art amplifies the harmonic signal while amplifying the signal, and outputs it together with the audio signal, which affects the output audio quality. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a communication equipment transmission signal amplification and filtering circuit, which includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a first amplifier and a second amplifier; [0004] One end of the first resistor is connected to the audio analog signal input end, the other end of the first resistor is connect...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H03F1/26H03F3/183
CPCH03F1/26H03F3/183H03F2200/03H03F2200/372
Inventor 李贤春
Owner 马鞍山格尚智能装备有限公司