CN205566244U - Signal processing circuit - Google Patents

Abstract

The utility model discloses a signal processing circuit, including resistance R1, electric capacity C1, triode VT1, inductance L1, inductance L2, triode VT2 and electric capacity C4, the resistance R1 one end VCC that connects respectively, electric capacity C1, inductance L1, electric capacity C5, resistance R5 and resistance R7, the electric capacity C1 other end is connected respectively to the resistance R1 other end, triode VT1 base and resistance R2, triode VT1 projecting pole connecting resistance R3, input vi is connected respectively to triode VT1 collecting electrode, the inductance L1 other end, the electric capacity C5 other end, electric capacity C4, resistance R5, resistance R6 and triode VT2 base, triode VT2 collecting electrode is the connecting resistance R7 other end and electric capacity C6 respectively. The utility model discloses the buffer amplifier that signal processing circuit delivered to transistor VT2 with the signal of input vi input carries out the signal amplification, adds inductance L3 and electric capacity C7 constitution decoupling circuit moreover, the filtering higher harmonic in the power, guaranteed the purity of output vo frequency wave form.

Description

A kind of signal processing circuit

Technical field

This utility model relates to a kind of analog circuit, specifically a kind of signal processing circuit.

Background technology

Signal processing circuit is the important component part in mobile phone wireless transmitter, in the front stage circuits of mobile phone wireless transmitter, produced by modulation oscillator circuit, RF signal power is the least, need through a series of amplification buffer stage, interstage amplifier section, final power amplifier stage, after obtaining enough radio-frequency powers, just can be fed to radiate on antenna, in order to obtain sufficiently large radio frequency power output, it is necessary to use signal processing circuit.

At present people are for the research focus of communication equipment on miniaturization, carry out simplifying that to optimize and keep higher stability be the emphasis of research in industry for ingredient each in communication transmitter；Emphasis the most of concern is all in power amplification, causes the waveform that a lot of processing mode deals all with clutter, and purity is relatively low.

Utility model content

The purpose of this utility model is to provide a kind of signal processing circuit, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, the following technical scheme of this utility model offer:

nullA kind of signal processing circuit，Including resistance R1、Electric capacity C1、Audion VT1、Inductance L1、Inductance L2、Audion VT2 and electric capacity C4，Described resistance R1 one end connects power supply VCC respectively、Electric capacity C1、Inductance L1、Electric capacity C5、Resistance R5 and resistance R7，The resistance R1 other end connects the electric capacity C1 other end respectively、Audion VT1 base stage and resistance R2，Audion VT1 emitter stage connects resistance R3，Audion VT1 colelctor electrode connects input Vi respectively、The inductance L1 other end、The electric capacity C5 other end、Electric capacity C4、Resistance R5、Resistance R6 and audion VT2 base stage，Audion VT2 colelctor electrode connects the resistance R7 other end and electric capacity C6 respectively，The electric capacity C6 other end connects output end vo，Audion VT2 emitter stage connects resistance R8，The resistance R8 other end connects the resistance R6 other end respectively、The electric capacity C4 other end and inductance L3，The inductance L3 other end connects ground capacity C7 respectively、The resistance R3 other end and the resistance R2 other end.

As this utility model further scheme: described power supply VCC voltage is 5V.

Compared with prior art, the beneficial effects of the utility model are: the buffer amplifier that the signal that input Vi inputs delivers to crystal triode VT2 is carried out signal amplification by this utility model signal processing circuit, and add inductance L3 and electric capacity C7 and form decoupling circuit, filter the higher hamonic wave in power supply, it is ensured that the purity of output end vo frequency waveform.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of signal processing circuit.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.

nullRefer to Fig. 1，In this utility model embodiment，A kind of signal processing circuit，Including resistance R1、Electric capacity C1、Audion VT1、Inductance L1、Inductance L2、Audion VT2 and electric capacity C4，Described resistance R1 one end connects power supply VCC respectively、Electric capacity C1、Inductance L1、Electric capacity C5、Resistance R5 and resistance R7，The resistance R1 other end connects the electric capacity C1 other end respectively、Audion VT1 base stage and resistance R2，Audion VT1 emitter stage connects resistance R3，Audion VT1 colelctor electrode connects input Vi respectively、The inductance L1 other end、The electric capacity C5 other end、Electric capacity C4、Resistance R5、Resistance R6 and audion VT2 base stage，Audion VT2 colelctor electrode connects the resistance R7 other end and electric capacity C6 respectively，The electric capacity C6 other end connects output end vo，Audion VT2 emitter stage connects resistance R8，The resistance R8 other end connects the resistance R6 other end respectively、The electric capacity C4 other end and inductance L3，The inductance L3 other end connects ground capacity C7 respectively、The resistance R3 other end and the resistance R2 other end；Described power supply VCC voltage is 5V.

Refer to Fig. 1, the signal of input Vi input is delivered to the buffer amplifier of crystal triode VT2 and is carried out signal amplification, its emitter stage has bigger feedback, the amplifier making VT2 form is more stable, resistance R5, R6 is biasing, R7 is load resistance, signal is by electric capacity C6 coupling output high-frequency signal, VT1 collector loop is by inductance L1 and electric capacity C4, C5 forms shunt-resonant circuit, regulation electric capacity C4, get final product the resonant frequency of regulating loop, inductance L3 and electric capacity C7 forms decoupling circuit, its effect filters the higher hamonic wave in power supply, to ensure the purity of output end vo frequency waveform.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in this utility model.Should not be considered as limiting involved claim by any reference in claim.

In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.

Claims (2)

1. null1. a signal processing circuit，Including resistance R1、Electric capacity C1、Audion VT1、Inductance L1、Inductance L2、Audion VT2 and electric capacity C4，It is characterized in that，Described resistance R1 one end connects power supply VCC respectively、Electric capacity C1、Inductance L1、Electric capacity C5、Resistance R5 and resistance R7，The resistance R1 other end connects the electric capacity C1 other end respectively、Audion VT1 base stage and resistance R2，Audion VT1 emitter stage connects resistance R3，Audion VT1 colelctor electrode connects input Vi respectively、The inductance L1 other end、The electric capacity C5 other end、Electric capacity C4、Resistance R5、Resistance R6 and audion VT2 base stage，Audion VT2 colelctor electrode connects the resistance R7 other end and electric capacity C6 respectively，The electric capacity C6 other end connects output end vo，Audion VT2 emitter stage connects resistance R8，The resistance R8 other end connects the resistance R6 other end respectively、The electric capacity C4 other end and inductance L3，The inductance L3 other end connects ground capacity C7 respectively、The resistance R3 other end and the resistance R2 other end.
2. Signal processing circuit the most according to claim 1, it is characterised in that described power supply VCC voltage is 5V.