CN2407507Y - Low power consumption electronic impedance transformer - Google Patents

Abstract

The utility model relates to a low power consumption electronic impedance converter, which belongs the electronic exchangers. The utility model solves the problem whether AC signals can easily obtain optimum loading effect after the impedance between two stage circuits is converted. The utility model comprises a double operational amplifier integrated circuit N, three capacitors C1, C2, C3 which are used for filtering and isolating, and a plurality of resistors R1-R10 with different resistance, wherein, the double operational amplifier integrated circuit N can be divided into a primary operational amplifier N: A and a secondary operational amplifier N: B; the resistors R1-R5 is connected with the N: A; the resistors R6-R9 and the capacitor C1 are connected with the N: B; the capacitor C3 and the resistor R10 are connected in series between the operational amplifiers; the capacitor C2 is connected in parallel with the resistor R7. The utility model can be widely used in the field of communication.

Description

The low power dissipation electron impedance transformer

The utility model low power dissipation electron impedance transformer belongs to the electronics converting means, relates in particular to a kind of low power dissipation electron impedance transformer.

When AC signal transmits in the line, obtain effective, the most suitable power, just relate to the problem of impedance matching in order to make load.All adopt transformer to realize in the general circuit, but, make AC signal be difficult for obtaining best load effect because volume of transformer is big, power consumption is big, unstable properties, and impedance matching will go wrong like this.

The structural design novelty of the utility model low power dissipation electron impedance transformer is scientific and reasonable, its goal of the invention has been not only to overcome the defective that transformer has, AC signal obtains effective, the most suitable power after making the circuit impedance conversion, obtain best load effect, and this converter instead of transformers fully, its effect is more excellent than the effect of transformer.

In order to realize the foregoing invention purpose, the technical scheme of utility model low power dissipation electron impedance transformer is as follows: the low power dissipation electron impedance transformer is used for filtering every straight capacitor C by a slice double operational integrated circuit N, three ₁, C ₂, C ₃Reach the resistance R that several resistances do not wait ₁～R ₁₀Constitute.Double operational integrated circuit N can be divided into one-level amplifier N:A and secondary amplifier N:B two parts, and three pin of N:A are 1,2,3, and three pin of N:B are 5,6,7, and the negative supply of double operational is V _Ss, its positive supply is V _Cc, resistance R ₁One end links to each other R with 2 pin of N:A ₁Other end ground connection, resistance R ₂One end links to each other with 3 pin of N:A, and its other end links to each other with transducer signal (1) end, same resistance R ₄One end also joins with 3 pin, R ₄Other end ground connection, resistance R ₃One end links to each other resistance R with 2 pin ₃1 pin of the other end and N:A joins resistance R ₅One end is connected with 1 pin, and its other end links to each other resistance R with transducer signal (2) end ₆One end links to each other R with converter (2) end ₆The other end is connected R with 6 pin of N:B ₇One end also is connected resistance R with 6 pin ₇The other end is connected capacitor C with 7 pin of N:B ₂With resistance R ₇Parallel connection, resistance R ₈6 pin of one end and N:B join resistance R ₉An end be connected resistance R with 5 pin of N:B ₈The other end and R ₉The equal ground connection of the other end, 7 pin are connected in series a capacitor C over the ground ₁, capacitor C ₃With resistance R ₁₀Serial connection, resistance R ₁₀The other end is connected capacitor C with 7 pin ₃The other end is connected with signal (1) end.

The low power dissipation electron impedance transformer is applicable to the intergrade between the two-stage circuit, realizes impedance conversion between level and the level making AC signal obtain the load effect of the best with this intergrade of converter.

If transducer signal (1) end, needs to hold output by (2) behind the transmission signal process first order amplifier N:A when signal (2) is held conduct output as importing, first order amplifier N:A is a homophase amplifier, and its multiplication factor is 1+R ₂/ R ₁, it is undistorted at first will to guarantee to transmit signal, just needs to regulate R ₃/ R ₁Value, regulate R according to specification requirement to output signal ₅, the circuit that N:A and N:B form separately negative feedback each other.(2) end output impedance and R ₅, R ₆, R ₇, R ₅Value relation is arranged, according to the specific requirement of line impedance coupling, regulate these several resistance and just can adjust (2) and hold output impedance.

If converter (2) end is as input, during (1) end conduct output, the signal that needs to transmit at first is sent to (1) end through second level amplifier N:B, and second level amplifier N:B is an inverting amplifier, and its multiplication factor is R ₇/ R ₈, signal is through resistance R ₆Amplify through second level operational amplifier N:B after the decay, the signal that (1) end obtains is regulated R according to concrete specification requirement again ₆, R ₇, R ₈Resistance after and decide, the output impedance of (1) end can be by adjusting R ₁₀Resistance changes.

No matter the signal of converter (1) end, signal (2) is held as input or output, and the impedance between its grade and the level can be adjusted at any time, makes impedance matching reach the optimum Match effect all the time, is convenient to AC signal and obtains the optimum load effect.The while converter is adjustable to impedance, and the stable performance of converter has been described, helps AC signal and obtains best load effect.

The utility model low power dissipation electron impedance transformer is compared with the transformer that the realization of general impedance matching is adopted, and has following feature:

Low power dissipation electron impedance transformer volume is little, power consumption is little, stable performance, with low cost, and impedance adjustable, AC signal easily obtain best load effect.

Accompanying drawing is a low power dissipation electron impedance transformer electrical block diagram.

Below in conjunction with the embodiment accompanying drawing this patent application technology being done one describes in detail.From accompanying drawing as can be known the low power dissipation electron impedance transformer by double operational integrated circuit N, filtering capacitance C ₁, C ₂, C ₃Reach the resistance R that several resistances do not wait ₁～R ₁₀Constitute, (1) end, (2) end among the figure are the signal ends of converter, and the signal end of converter can be made input can make output again.Double operational integrated circuit N can be divided into one-level amplifier N:A and secondary amplifier N:B two parts, and three pin of one-level amplifier N:A are 1,2,3, and three pin of secondary amplifier N:B are 5,6,7, and the negative supply of double operational N is V _Ss, its positive supply is V _Cc, resistance R ₁One end, R ₃One end is connected R with 2 pin of N:A ₁Other end ground connection, R ₂The other end link to each other resistance R with 1 pin of N:A ₂One end, R ₄One end all is connected R with 3 pin of N:A ₂The other end is connected resistance R with transducer signal (1) end ₄Other end ground connection, resistance R ₅One end is connected with 1 pin of N:A, and its other end and transducer signal (2) end joins resistance R ₆One end links to each other R with converter (2) end ₆The other end is connected resistance R with 6 pin of N:B ₇One end, R ₈6 pin of one end and N:B join, and the R7 other end is connected capacitor C with 7 pin of N:B ₂With resistance R ₇Parallel connection, resistance R ₉One end is connected resistance R with 5 pin of N:B ₈The other end and resistance R ₉The other end all connects same ground, and 7 pin are connected in series a capacitor C over the ground ₁, serial connection one resistance R between 7 pin of N:B and signal (1) end ₁₀, capacitor C ₃

When AC signal from converter (1) when input end, signal is earlier through resistance R ₂, R ₄After the decay, N:A is that multiplication factor is 1+R through first order amplifier ₃/ R ₁In-phase amplifier after to 1 pin of N:A, again through resistance R ₅The decay back is sent from (2) end, and its output impedance is R ₅∥ (R ₆+ (R ₇∥ R ₈)).

When signal from converter (2) when input end, through resistance R ₆After the decay, be that multiplication factor is R through second level amplifier N:B ₇/ R ₈Inverting amplifier amplify after, through resistance R ₁₀, capacitor C ₃To converter (1) end, its output impedance is approximately resistance R ₁₀

This low power dissipation electron impedance transformer can be widely used in having between the input of concrete specification requirement, the output transmitting signal, be particularly suitable between the circuit of bi-directional, each end (transducer signal end) all both can be used as input, can be used as output again, in the communications field, have a wide range of applications.

Claims (3)

1, the utility model low power dissipation electron impedance transformer is characterized in that the low power dissipation electron impedance transformer is used for filtering every straight capacitor C by a slice double operational integrated circuit N, three ₁, C ₂, C ₃Reach the resistance R that several resistances do not wait ₁-R ₁₀Constitute, double operational integrated circuit N can be divided into one-level amplifier N:A and secondary amplifier N:B two parts, and three pin of N:A are 1,2,3, and three pin of N:B are 5,6,7, and the negative supply of N is V _Ss, its positive supply is V _Cc, resistance R ₁2 pin of one end and N:A join resistance R ₂One end, R ₄One end all joins resistance R with 3 pin of N:A ₂The other end links to each other resistance R with converter (1) end ₃One end links to each other resistance R with 2 pin ₃1 pin of the other end and N:A joins resistance R ₅One end also joins with 1 pin, and its other end links to each other resistance R with converter (2) end ₆One end links to each other with converter (2) end, and its other end is connected resistance R with 6 pin of N:B ₇One end also is connected with 6 pin of N:B, and its other end is connected capacitor C with 7 pin of N:B ₂With resistance R ₇Parallel connection, resistance R ₈6 pin of one end and N:B join resistance R ₉An end be connected capacitor C with 5 pin of N:B ₁One end is connected with 7 pin of N:B, is serially connected with capacitor C between converter (1) end and 7 pin ₃And resistance R ₁₀

2, low power dissipation electron impedance transformer as claimed in claim 1 is characterized in that resistance R ₁Other end ground connection, resistance R ₄Other end ground connection, resistance R ₈The other end and resistance R ₉The other end all is connected to same ground, capacitor C ₁Other end ground connection.

3, low power dissipation electron impedance transformer as claimed in claim 1 is characterized in that (1) end of low power dissipation electron impedance transformer, (2) end are the AC signal end, and the AC signal end both can be used as the input of converter, can be used as the output of converter again.

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