JPS62502372A - wideband signal amplifier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] wideband signal amplifier The invention relates to a broadband signal amplifier according to the preamble of claim 1.

In the case of this type of wideband amplifier, it is often necessary to reach the OHz to MegaHz range. High requirements are set for certain transmission frequency bands. as large as possible The signal level should be transmitted without distortion. Furthermore, noise sources inside the amplifier signal distortion must be kept as low as possible. Exactly broadband amplification crime In humans, this is accompanied by significant difficulties.

Additional control circuitry is required for adjustment, as well as total amplification adjustment. The main reason for this is that the feedback ratio cannot be determined accurately. Furthermore, the overall transmission characteristics of the amplifier All the requirements set for a given field of use have not yet been met.

To meet the requirements for using operational amplifiers in wideband oscillography Previous efforts to design this operational amplifier with broadband and accurate phase also failed in this case. problems associated with stabilizing individual circuit stages and measuring signal transit times. failed for. At even lower frequencies, the component has a "complementary" characteristic and is well matched. Components exhibiting matching characteristics - e.g. bipolar transistors in NPN or PNP technology If the frequency is in the megahertz range, an amplifier with such ideal characteristics is required. Completely indicates deviations that impair the composition of the. Therefore, in the past, wideband operational amplifiers In practice, a series of differential amplifiers are used to keep the voltage fluctuations to a small value. It was. However, this type of operational amplifier, which has an asymmetric internal structure, also Due to its nature, it does not meet the requirements for signal processing.

The problem of the present invention as indicated in claim 1 is that the input impedance is high. As mentioned at the beginning, it has a large amplification factor, bandwidth, and coefficient, and can be configured with even lower noise. It is an object of the present invention to provide an amplifier with improved performance. Amplifier is a potentiometer as an operational amplifier connected like this. The purpose is to install a high-resistance and electrical This is so that a signal can be supplied to a signal point where no signal is added.

The basis of recognition of the invention is that, in the case of the use set out here, the requirements for transmission quality are A unique method is used to construct an amplifier with potentiometer characteristics for the purpose of satisfying It is about arranging a method. In the case of the solution according to the invention, the signal amplification is actually performed twice This is done through complementary amplifier stages in each phase. In this case, the output signals of the individual stages are The signals are again combined into a common signal at the amplifier output. Therefore different conductivity The unbalance associated with the signal processing by the type transistor is compensated for, and Due to the complementary circuit stage, the signal distortion with unbalanced weights continues in the above-mentioned order. Cancellation also occurs through circuit stages.

The quality of the measuring instrument depends on the type and configuration of the broadband DC voltage-measuring amplifier.

The requirements simultaneously met by this type of amplifier are set as follows: The amplifier must have little inherent noise.

Therefore, active and passive components are kept as small as possible and with as little noise as possible. items are requested.

The amplifier needs to have extremely high bandwidth. So it works as quickly as possible Components and low-resistance wiring as well as low capacitance throughout the network are required. be done.

With this wide bandwidth, the amplifier is able to maintain its oscillation characteristics as wave-like as possible in feedback-coupled operation. In order to form it faithfully to the shape and without excessive vibration, the signal running time is just 1 minute. You must only have one.

An amplifier has as high a controllability (crest factor) as possible with respect to its supply voltage. Even if necessary and over-controlled, signal distortion or signal reflections should be kept in the normal control region. shall not have any.

Amplifiers are designed to produce accurate amplification when a measuring resistor is connected to the amplifier input. Therefore, it must have a high input impedance.

The amplifier must have only a small input capacitance. For example, the reason is that the amplification of the previous stage The input impedance of the amplifier is extremely high, and the current This is because resistance values that are too low cannot be used for reasons of line savings and line savings. same reason Therefore, the capacitance inside the amplifier must be kept to a small value.

The amplifier operates over its entire control range, i.e. for negative amplitude values as well as for positive amplitude values. However, they must have the same speed characteristics (travel time and bandwidth). signal This is to enable amplification as faithful to the waveform as possible.

The amplifier uses negative feedback coupling to increase the input impedance and obtain high measurement accuracy. In order to achieve this, it is necessary to have high no-load amplification.

Amplifiers can be configured in a small number of configurations and combinations to take into account the unique task settings of the device. Only setup costs should be required.

This problem setting shows that the amplifier must have the following characteristics at the same time: Low noise amplifier, wideband amplifier, large signal amplifier, two-phase compensated amplifier.

The measurement amplifier must have the characteristics of a stable amplifier for long-term operation; It is assumed that the amplifier is low in price and faithfully reproduces the waveform of small signals. do.

An advantageous inventive solution consists in the construction of two symmetrical parallel-running amplifier banks.

This amplifier bank consists of bipolar amplifiers in the form of complementary Butschsol amplifiers, which follow one another in an alternating sequence. PNP- and NPN-) transistors. This push-pull circuit has one The structure of both transistors in the circuit stage of The corresponding FET-) transistors are controlled in the same phase.

The control of the latter FET (-) transistor has extremely high requirements for noise characteristics. This is the case when it is determined.

This configuration has many advantages. First of all, the zero points connected doubly in parallel. What is achieved by the symmetric configuration is that if it is positive in this Bushzol configuration, Signal control with negative amplitude and negative amplitude prevents the following: If the signal in the amplifier has a small signal amplitude, the small current is When a large current is passed through an individual semiconductor, the amplitude depends on the This prevents the occurrence of intermittent characteristics. Depending on this amplitude for single-sided amplifiers, Traditionally, relative signal control has been used to reduce the occurrence of travel time characteristics that This has been addressed by providing a high resting current to prevent this from occurring. this This is not done in the case of the present invention. For example, NPN-emitter 7 in an amplifier string For the Olowa, a decreasing current is formed in the case of control with a positive polarity signal. .

But at the same time the PNP-emitter filter installed here in the symmetrical amplification path The opposite condition applies for the follower, i.e. its current is in phase with the amplifier input. increases in response control. Both amplifier paths have both collectors of the two transistors It is configured like this bridge circuit because it has merging points at points that operate in a complementary manner. The different characteristics in the dual amplifiers are canceled out. An extension configured as a bridge Due to the compensation principle of the current-dependent control characteristics of the width control circuit, the required current is significantly higher. This makes it possible to construct an amplifier that is less sensitive to signal amplitude control.

This Bushsol-type glitch circuit according to the invention provides further advantageous characteristics. Ru. For example, in this way, for the Pipo2 transistor, it is almost ideal. An amplifier having input impedance characteristics can be configured. This is true This applies to both purely resistive and capacitive components of force impedance. this For this purpose, first of all, according to one advantageous embodiment, the base terminals on one side are connected to each other. Connected input crab follower and emitter together via resistor The connection to the base terminals of the two subsequent transistors should be considered.

The assumption is that two cells with substantially the same current amplification (hfe) A transistor is used. Both emitter followers are symmetrically identical. Symmetrically the same emitter resistance at the same supply voltage (in this case +12V and -12V) Therefore, the same value of current flows through their emitters. same or almost If both bases have the same amplification, connect both bases to base voltages of the same magnitude with different positive and negative signs. The flow flows. Therefore, one input transistor is connected to the complementary input transistor of the same amplifier stage. form the input current to the resistor. Therefore, the signal source only needs to send out current. This creates a significantly higher input impedance. This input The impedance is also increased by a factor of 51 degrees due to the additional bushing. vs. In the case of the transistor being formed, the input input voltage range is 10012 ohms in the prototyping room. impedance was measured. This type of amplifier can be used, for example, with a 10M ohm precision preamplifier. A resistor can be connected without detectable errors.

The same applies to the input capacitance of the amplifier as to the input resistance. usually Operational amplifier input side For example, considering the input side of a differential amplifier, the base-emitter Input capacitance increases significantly at the input side of the amplifier when the source impedance is extremely high. It works against you. In the case of the solution of the invention, this input capacitance is significantly smaller and ideally In some cases, it even becomes zero.

Advantageous embodiments of the invention are indicated in the dependent claims. Next, examples of the present invention will be explained. This will be explained using the following drawings.

FIG. 1 shows a first embodiment of the amplifier of the present invention, and FIG. 2 shows a modified embodiment of the embodiment of FIG. An example is shown.

In the embodiment shown in FIG. 1, the input signal is routed to input E. In the embodiment shown in FIG. this In this case, the resistor-capacitor combinations R1/C1 and R2/C2 provide 1 A potentiometer circuit for adjusting the amplification of the operational amplifier is configured.

The input stage consists of a complementary bipolar transistor pair T1 and T2. this place In this case, both base terminals are common to resistors/capacitors R1/CI and R2/C2. connected to the terminal connected to. This point forms a “virtual earth” and this Based on the phase rotation of the resistor/capacitor R2, the DC- and AC voltage negative A feedback coupling is formed.

It has the characteristics of an operational amplifier. Complementary input transistors T1 and T2 Because the bases are connected to each other and both transistors have different polarity Therefore, the base currents flow complementary to each other. As a result, the DC voltage component of its base current is applied to resistors R1 and R2. Complementary first amplification stage configured as emitter follower has been done. In this case, the partial voltage is applied to the subsequent stage via resistors R3/R5 or R4/R6. This is done for transistors T6 and T4. The self of resistors R5 and R6 The terminals are placed at a fixed DC voltage potential. This DC voltage potential is a symmetrical voltage supply From the potential "+" to "-", the diode D1 and It is led via D2 to D3 and D4.

Voltage-supply potentials "+" and "-" are connected to capacitors C5 and C7 or C6 and and smoothed by C8. In this case, capacitors C7 and C8 are electrolytic capacitors. capacitors C5 and C6 are formed as wound capacitors. filter out high frequency components. Flows through a diode connected in the conduction direction The currents each form a collector current for the transistors of the input stage. input When the collector current of a stage increases, negative DC feedback to the subsequent stage occurs. has its base connected to the collector current point. This negative feedback is due to this The amplifier has high stability despite consistent DC voltage coupling. Engineering Transistors T3 and also formed complementary, operated as follower, The emitter resistors R9 and RID of T4 and T4 have their common terminal point connected via resistor R11. and is guided to the reference potential. In this case as well, the current flows into both transistors or The currents flowing out of the transistors will be complementary. Therefore resistor R9 and RID If the values of are the same, the common terminal of both resistors is normally placed at the reference potential.

When a balanced current must be generated due to asymmetries resulting from product-to-product variations, this The balance current causes a voltage drop across resistor R11. This voltage drop has the following effect , i.e. as a result of the negative feedback coupling formed, one of the two currents increases. the other is reduced. Therefore, approximately complementary action takes place. transistor T3 and the voltage drop across collector resistors R13 and Ri4 assigned to T4 forms the input voltage for subsequent transistors T5 and T6.

These transistors are activated in the base circuit. In this case the base is The potential controlled by the current flowing through the power stage transistor is applied in the form of a DC voltage. It will be done. As a result, a regulating effect by the DC voltage also occurs in that limit. transis The collectors of T5 and T6 are connected through a common collector resistor R15. Ru. The voltage at the collector is directly connected to the transistor T7 forming the subsequent complementary stage. and reaches the base of T8. These transistors can also be made as emitter followers. be moved. In this case, the output side is the connection of both emitter resistors R17 and R18. Symmetrized through a point. Both of the above resistors form an additional DC voltage negative feedback. do. Successive transistor stages T6 and T5 or T4 and T6 are complementary form a code circuit.

The individual stages of this circuit are also complementary symmetrical on top and bottom. Transistor stage T 5 and T6 produce significantly greater voltage amplification as each second stage of the cascode circuit. make it disappear. Due to the action of the preceding and subsequent stages, these transistors are It shows ideal characteristics. This is because these transistors have almost no overlays. Due to the near-maximum collector resistance and low-resistance signal source, the input capacitance increases significantly. This is because it is activated without any addition.

In order to save on components and to provide amplification from the second stage, the second stage is an inverting amplifier. Used as a push-pull amplifier. The potential at the point between the emitters of the transistor is Since it changes according to the input signal, the input signal changes in proportion to this input signal. A current is passed through a resistor connected between the emitter midpoint and ground. this Current is also conducted through the collector of the second transistor.

This current is then connected to each collector of the second transistor and to the positive or negative supply voltage. flows through each connected collector resistor, i.e. the two subsequent amplifications. The current flows from the emitter of the transistor in a controlled manner. Because those the base of is formed by two semiconductor diodes each operated in the conducting direction This is because a constant voltage is supplied by the bias voltage.

Due to the 180 degrees of phase rotation introduced throughout the amplifier, this amplifier It operates as an operational amplifier with voltage amplification.

The unique characteristics of this amplifier are illustrated by the following operational description: First of all, in the equivalent circuit diagram of the input, the bridge looks like K, PNP-) Lanzos capacitance of base-emitter section of transistor T1 and NPN-) base of transistor T2 - the capacitance of the emitter section. This bridge occurs when the polarity of the signal current course is reversed. and the edge capacitance compensate for each other.

Furthermore, the emitters of input transistors T1 and T2 are simultaneously connected to a common base potential. The base of the emitter follower transistor also follows in the following direction: The emitter also follows the change in potential at the same time in the same direction. This state is Transistors T3 and T are downstream connected to power transistors T1 and T2. 4, it has an important meaning. This is because the second stage transistor and this Possible capacitance in the emitter resistance of a transistor is subject to charge reversal. This is because it will not happen. This means that the first four transistors are This means that it is possible to follow the target at a new speed.

Therefore, the four input transistors T1 to T4 constitute a separation amplifier with extremely fast response. to be accomplished. This amplifier has a significantly higher input resistance and a significantly lower input capacitance. It has speeds that can only be achieved with Bush Blue double emitter followers.

Regarding the accuracy of the waveform, we further improve the accuracy of the waveform. It can be called an almost ideal power amplifier with respect to speed and signal transit time. Ru. Moreover, as long as both are measured at the midpoint between the two emitters, the positive-negative one We will strive to achieve good control down to the power supply voltage.

The subsequent transistors T5 and T6 forming the differential amplifier are connected to their high resistance cores. It works directly complementary to the rector. So these transistors are first This results in a significantly higher amplification at the second common collector point. The amplifier paths that run separately up to the point merge at this point. With this configuration, At only one high resistance internal point of the amplifier and the subsequent push-pull emitter The follower capacity no longer has any decisive meaning. Because this This is because the capacitors do not form a capacitive load because their potential courses are equal.

The amplifier composed of these 2×4 transistors is based on its symmetry. It has yet another advantage.

As is known, an NPN-) transistor is a charge carrier in an N-doped region. For better mobility, similarly configured PNPs are used. also constitutes a faster component. What is immediately obvious from this circuit is that the upper Similarly, PNP- and NPN- are set in alternating order in the width path. The difference in transit time is first caused by numerous variations in the amplifier path, as well as by both It just disappears during the sum formation in the case of the convergence of the amplifier paths of . This compensation is This is another advantage of the wedge-type configuration.

The requirement for even higher controllability is also taken into consideration.

In both first amplifier stages, the potential changes around the zero point, so the potential changes in the 1+” direction as well. −” direction is also controlled symmetrically and equally. Furthermore, it is controlled from the emitter. , in the base-to-base circuit of the third amplifier stage, a constant base voltage The ode is formed as follows. That is, these sixth amplifier stages T5. T6 d At the emitter, the potential at the emitter is held constant at only 0.6 V. As it is, it is formed. This stage, which operates as a differential current amplifier, therefore In fact, in the vicinity of each battery voltage, the control is directed toward the battery voltage at the collector. You can move up to about 1 inch in each direction.

The same applies to the post-connected emitter followers T7 and T8. Of course it applies. In this way the following was accomplished: For example, +12/- Linear control of 22V peak/peak signals in case of 12V voltage supply is reliable. This is done without signal distortion or known signal reflections. of course Feedback coupling improves this property even more significantly.

I will not explain anything important about high-speed response amplifiers. As explained - there is as little capacity as possible - yh and if this capacity is low unaffected by a low value resistor or by a low impedance power source. It is a state. The amplifier is designed in a very special way to achieve this condition.

As already explained, the human power capacity of this amplifier is compensated by the first amplifier stage.

Its output side, i.e. the emitter of both first and second emitters, is a low resistance voltage source. It is. In the next stage, the base-emitter capacitance has no effect, because the emitter This is because there is no need to perform charge reversal of the capacitance due to the equal progression of voltage on the AC side. be. Therefore, the second bush sol amplifier stage T3. The emitter of T4 is also a low resistance voltage It also has a significantly lower resistance in the emitter resistor T-circuit. same The same is true for this second stage collector, because this second stage collector Re.

The lid is connected to a constant potential of the differential current amplifier, i.e. This is because the resistance is kept low. Therefore, up to this stage, the capacitance of both amplifiers is It has little effect on the pathway. However, the required high no-load amplification Therefore, points of high resistance cannot be avoided in the circuit. But this works complementary This is the meeting point of both collectors. Here the connection has to be kept extremely short. In addition, it is necessary to consider the capacitance to ground potential. But here too, pussy The emitter follower consists of two transistors and The followers form almost no capacitive load due to their equal running characteristics. Therefore the following Benefits can be obtained. In other words, all circuit points of the amplifier except this junction are emitter-controlled. Moreover, the low resistance of almost all network points has the following advantages: has. That is, the disturbance signal is reduced in size by the high-resistance confluence is protected by a filtered low-resistance potential. has the advantage of being able to avoid Furthermore, the measurement amplifier is thereby minimized with respect to its semiconductor components. This consideration leads to the following conclusion: The first two Butsch Solbridge emitter followers are Used for isolation of high resistance input side for low resistance signal processing. second thing The Schnorr amplifier stage is separated once again to ensure low capacitance and for each supply voltage level. Used for inverting the signal to the bell. The 6th push-pull stage has no-load amplification The bridge amplifier path runs separately for the original amplification and initially for the formation It is used for the formation of confluence. The last two transistors are connected to the low resistance amplifier output. It is used as a small capacity isolation amplifier for forming a power source. Improve its efficiency In order to achieve this, silicon transistors with high current amplification are selected.

Advantageously, a minimum number of components can be used to form this broadband DC voltage amplifier. Can be done. This condition makes the circuit optimized for price analysis as well, making it even more complex. Regarding sound, an unexpected optimization was achieved when using transistors with significantly lower noise. provided.

What should be added is that this amplifier fulfills the advantageous characteristics of a DC voltage amplifier. Add. This is because the above-mentioned double configuration was used, so one complementary transistor was Use as push-pull circuits and bridge configurations – temperature reduction of individual circuit stages degree drift is also accurately compensated for.

The prototype revealed that this amplifier maintains a constant temperature over a wide temperature range. It is to have an output DC voltage.

Additional configurations such as high speed with low noise – use of silicon transistors and Due to the construction with SMD technology with significantly short conductor paths, all of the above mentioned It is possible to provide an amplifier that satisfies these requirements.

Amplifier consisting of 8 bipolar transistors has extremely good noise characteristics For example, in the high frequency range. On the other hand, this characteristic is especially true in the low frequency region. e.g. frequencies below 10 Hz (and e.g. if this amplifier is controlled with a high resistance) In the case of ), all requirements 1 are satisfied L'''7. This is due to the line mechanism of the bipolar transistor and the two amplifiers. High requirements for series connection and at the input point of the entire channel amplifier path is in a state of high resistance control.

In the case of the embodiment shown in FIG. 2, particularly low-noise characteristics of the input stage are obtained. Ru. In this case, the transistor T1 is an n-channel-desolution layer-field effect transistor. This field effect transistor is a source follower. It is operated as a wa. In this case, the field effect - due to the potential state in the transistor Therefore, transistor T1/ has opposite polarity compared to bipolar transistor T1. have The reference electrode in a bipolar-only circuit is on the opposite side to the reference potential. In contrast, the reference electrode of a field effect transistor is on the same side as the reference potential. So R4', R5' and R7 are used as ground resistors. In this case, resistor R7 is Configured as a trimmer and adjustable to balance product-to-product variations . Resistor R' creates a voltage drop across the base terminals of subsequent transistors T3 and T4. Occur. Diodes D1 and D2 are connected to the drain electrode. but In this circuit, the voltage dropped across these diodes is across transistor T1/ This was also the case for bipolar-only circuits. Therefore, it cannot be used as a measure for the collector current flowing through one transistor T2.

The input amplifier of the oscillograph advantageously has this type of circuit for its input isolation stage. do. The advantage of field effect transistors is that the field effect Due to the control mechanism, the bipolar noise and scintillation noise are In the case of resistors, the resistance is also significantly lower. On the other hand, field effect transistors Due to the temperature drift characteristics of If so, a circuit configuration that can be modified as necessary is required. as shown , two identical field effect transistors have a current flowing through both field effect transistors. They are connected so that the currents are equal. So both potentiometers For different characteristic curves, the operating point is adjusted as follows: That is, the original For the source-follower, the current flows through the second field effect transistor whose date is connected to the The operating voltage across the region is input to the compensation circuit constructed in this way. Be sure to keep constant for your followers, e.g. bias on that date. The current voltage is made to reach 0.

The field effect transistor itself has a characteristic of high input impedance. the Therefore, the field effect transistor satisfies the high resistance required at this location. Input capacity A push-pull circuit using complementary field-effect transistors enables bipolar It can also be formed in the same manner as shown in the case of resistors.

In the case of the circuit shown in FIG. 2, the input stage is constructed asymmetrically. Because complementary field effect As a result, transistors are manufactured only at extremely high costs, so they are expensive. It is. Transistor T2' is connected to its operating point via resistors R6/ and R8. This constitutes a constant current source that is regulated by The current flowing through the transistor T2/ is Corresponds to the current flowing through resistor R'. In this case, similarly in series with transistor T2/ The voltage drop across diodes D6 and D4 connected to Used for the formation of piezoelectric potential.

Two field effect transistors T2/ with the same polarity are provided, and their date terminals are on the input side. Please refrain from connecting with.

Due to this second field effect transistor, the voltage amplification degree is compared to that of a completely complementary circuit. It seems low in comparison. The use of the same components does not perform the function of the control electrode. be. However, a quasi-complementary characteristic is established for the control of subsequent stages.

In this way, the advantages of the amplifier of the present invention can be realized without the use of expensive components and with high resistance. Used for applications where emphasis is placed on input.

The subsequent stage corresponds in its construction to the embodiment of FIG. Therefore matching parts use the same symbol.

The invention is not limited to the embodiments described above.

A large number of variants are also possible, which can also be used for embodiments that differ fundamentally from the solution shown. It is. For example, in order to increase the controllability of the input stage, for example The input transistor terminal connected to the conductor is connected directly to the supply potential, and this semiconductor It is advantageous to interconnect the resistor that determines the current flowing through the semiconductor via an additional resistor It is.

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Claims (14)

[Claims] 1. Multi-stage DC voltage coupled wideband signal amplifier with transistors of different conductivity types For example, it is used to amplify the input analog signal in an oscilloscope. a wideband signal amplifier in which each gain is switched between supply potentials of different polarity The width amplifier stage has a pair of transistors of different conductivity types symmetrically, and the transistor processes the useful signal when the entire useful signal is supplied in the same phase state; Furthermore, successive transistors connected to supply potentials of the same polarity are also connected to each other. have different conductivity types, and the input stage is configured as an emitter follower. In a multi-stage DC voltage-coupled broadband signal amplifier, following the input stage The circuit stages form a cascode circuit, i.e. the order in which the emitter and base are grounded. Multi-stage DC voltage coupling broadband signal amplification characterized by configuring subsequent circuit stages vessel. 2. A claim in which an emitter follower circuit is connected after each cascode circuit. A wideband signal amplifier in the first term of the range. 3. Transistor voltage on the same side as the reference potential as the midpoint of supply potentials of different polarities Any of the preceding claims in which the poles are interconnected via at least one resistor. 2. The wideband signal amplifier according to item 1. 4. Divide the resistance into two equal partial resistances and connect the connection point of both resistances to the signal output side. or as a reference voltage as an intermediate point between supply potentials of different polarity. The wideband signal amplification according to claim 5, wherein vessel. 5. Base and/or emitter grounding of an amplifier stage operated as base grounding The amplifier stage of the associated cascode circuit, which is operated in the conduction direction, is effectively connected to the terminals of a series connection body of semiconductors through which a constant current flows, and the series connection Any one of the preceding claims, in which the other terminal of the connection body is connected to the relevant power supply potential. Wideband signal amplifier as described in Section. 6. Connect a capacitor to the connection point, and connect the other terminal of the capacitor to the reference potential. Then, the capacitance of the capacitor is set to substantially the AC voltage component of the effective signal at the connection point. The wideband signal amplification according to claim 5, which is selected to a value that can be removed visually. vessel. 7. The emitter resistor of the first circuit stage is formed as a voltage divider and taken out in the direction of the supply potential. In the previous claim, the partial voltage applied to the A broadband signal amplifier according to any one of the scopes. 8. Instead of field effect transistors and bipolar transistors, each phase a broadband signal amplifier according to any one of the preceding claims, provided in a corresponding circuit; . 9. Two field effect transistors with the same polarity are connected in series as the input stage. Connect one of them as a source-follower and the other as a constant current source, In this case, the gate terminal of the source-follower forms the amplifier input side, and the complementary gate terminal of the subsequent stage Insert the control electrode of the transistor between the source resistance of the source-follower and the constant current source. The wide resistor according to any one of the preceding claims connected to the terminals of the resistor inserted therein. Bandwidth amplifier. 10. A source-resistor connected as a source-follower and as a constant current source Wideband signal amplifiers according to claim 9 having substantially the same values. . 11. Source resistance to balance product-to-product variations in field-effect transistors 11. The broadband signal amplifier according to claim 10, which is formed as a trimmer resistor. 12. Any of the preceding claims in which the transistor is manufactured using silicon technology 2. The wideband signal amplifier according to item 1. 13. In the preceding claims, the input and output terminals of the amplifier form a bridge circuit. The wideband signal amplifier according to any one of the above. 14. The input and output sides are 180° wide with negative feedback coupling that determines the total amplification. The wide band according to claim 13, configured like an operational amplifier having phase rotation. range signal amplifier.