Circuit structure with signal amplification function

A technology of circuit structure and signal amplification, applied to amplifiers, improved amplifiers to reduce noise impact, electrical components, etc., can solve the problems of unadjustable signal input size, large preamplifier size, and serious noise interference, etc., to achieve signal accuracy and Authentic, good authenticity, strengthen the effect of magnification effect

CN106533368AInactive Publication Date: 2017-03-22成都意科科技有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-03-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a circuit structure with a signal amplification function. The circuit structure comprises an amplifier, a transformer, a second resistor, a third resistor, a fourth resistor, a first capacitor, a third capacitor and a signal source, wherein a third pin and a fourth pin of the amplifier are connected to both ends of a secondary coil of the transformer; both ends of a primary coil of the transformer are connected to both ends of the signal source; a slide tap is arranged on the primary coil of the transformer; a fourth pin of the amplifier is connected to one end of the third resistor; the other end of the third resistor is connected to a fifth pin of the amplifier; both ends of the third resistor are connected to the first capacitor in parallel; and the fifth pin of the amplifier is taken as an output end of the amplifier. The slide tap is arranged on the primary coil of the transformer, so that the signal input strength is changed, and a feedback resistor is connected to the capacitor in parallel, so that the purposes of improving the operational amplifier stability and preventing the self-excitation shock are realized.
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Description

technical field

[0001] The present invention relates to a circuit structure, and in more detail, relates to a circuit structure with a signal amplification function. Background technique

[0002] In RF system engineering, the three important parameters of frequency, power and impedance are all characteristics that characterize RF system engineering and circuits. These three parameter characteristics are closely related to all radio frequency circuit types, principles and characteristics. Since the three important parameters of frequency, power and impedance are the three core characteristics of RF system engineering, they are called the three major elements of RF signals, which can vividly reflect the basic content of RF system engineering and its circuits. The three elements of frequency, power and impedance not only have independent characteristics, but also affect each other. By frequency, one radio frequency signal can be isolated from another radio frequency signal, a...

Examples

Embodiment

[0021] Such as figure 1 As shown, this embodiment provides a circuit structure with a signal amplification function, including an amplifier A, a transformer T, an inductor L, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the signal source Ui and the external power supply U;

[0022] The third and fourth pins of the amplifier A are connected to both ends of the secondary coil of the transformer T, one end of the primary coil of the transformer T is connected to one end of the inductance L, and the other end of the inductance L is connected to one end of the signal source Ui , the other end of the signal source Ui is connected to the other end of the primary coil of the transformer T opposite to the inductor L, one end of the fourth capacitor C4 is connected to the other end of the inductor L opposite to the signal source Ui, and the other e...