DE102005003889B4 - Method for compensation of disturbance variables, in particular for temperature compensation, and system with disturbance compensation - Google Patents

Abstract

System (1, 100, 200) with disturbance compensation, comprising: a device (3, 103, 203) for compensation of the system (1, 100, 200) influencing disturbances, in particular for temperature compensation; and a further device (5, 105) for compensating disturbances which additionally influence the system (1, 100, 200) by the disturbance compensation device (3, 103), wherein the further device (5, 105) comprises a transistor (140 ), and an operational amplifier (142) in which a first input to a control input of the transistor (140) is connected, an output to the control input of the transistor (140) is fed back, and a second input to a collector of the transistor (140 ) connected.

Description

The invention relates to a method for compensation of disturbance variables, or for temperature compensation, in particular in non-linear systems, and a system with disturbance compensation.

In semiconductor devices, in particular z. As in corresponding, integrated (analog or digital) arithmetic circuits, and other electrical circuits, or - more generally - signal processing systems, in particular corresponding linear or non-linear systems, for. As filter circuits, digital-to-analog converters, amplifiers, controllers, etc., etc., the problem must often be solved to compensate for such interference, z. B. based on temperature fluctuations disturbing influences, and / or other, hard to describe external and / or internal disturbing influences (eg., Nonlinear temperature-dependent process influences, etc., etc.).

For example, bandgap reference circuits are known in which it is attempted to compensate for the temperature dependence of a bipolar diode voltage by a voltage proportional to the absolute temperature (first order compensation linear system). With the help of such conventional systems, interference, z. B. corresponding temperature-dependent interference i. A. are only partially eliminated - it remains a non-compensated "remainder".

The solution of o. G. Problems are further complicated when corresponding non-linear signal transmission paths are present, and the interference influences at any point of the signal path.

In linear / non-linear systems are - as input variables - one or more input signals present, the z. B. (analog) be further processed linear or non-linear. As outputs - or as a result of the signal processing - one or more output signals are provided by the system. In particular, in order to come as close as possible to the model description of an ideal linear / nonlinear system, it is desirable for the output signal (s) to appear as unaffected as possible by the system temperature and / or other disturbances at the output of the linear / nonlinear system.

In the publication DE 69519438 T2 a circuit for output compensation of a bandgap reference circuit is shown with changes in the functional behavior as a result of process and temperature fluctuations. In this case, an iw constant output reference voltage is to be generated, which can be tapped at an output of the circuit.

In the publication NL 9000352 A a circuit is shown with which an output current of an amplifier circuit is to be influenced. In this case, an operational amplifier is used whose inputs are connected to control inputs of transistors.

In the DE 19804747 A1 there is shown a bandgap reference circuit that provides a selectable bandgap reference voltage that is insensitive to temperature.

In the publication JP 63236112 A For example, an operational amplifier is shown in which an input is connected to two control inputs of two transistors, and an output to a device which is connected via resistors to the collectors of the transistors.

In the DE 3241364 C2 a temperature compensated power source is shown.

In the US 6603110 B2 a temperature compensated circuit is shown having an operational amplifier.

The invention has for its object to provide a novel method for the compensation of disturbance variables, or for temperature compensation, and a novel system with disturbance compensation.

It achieves this goal by the subject matter of claims 1 and 11.

Advantageous developments of the invention are specified in the subclaims.

In the following the invention will be explained in more detail with reference to several embodiments and the accompanying drawings. In the drawing shows:

1 a schematic, exemplary representation of a block diagram of a device for compensation of disturbances or for temperature compensation according to an embodiment of the present invention;

2 a schematic, exemplary detail representation of the in 1 illustrated compensation principle realizing circuitry; and

3 a schematic, exemplary detailed representation of another in the 1 illustrated compensation principle realizing circuitry.

In 1 is - schematically, and by way of example - a schematic diagram of a device 1 for compensation of disturbance variables or for temperature compensation according to an exemplary embodiment of the present invention (or, more precisely, the signal-processing path of such a device 1 ).

How out 1 shows, is in the device 1 - via a signal line 7 An input signal S _in , and from the device 1 subjected to appropriate signal processing processes.

As a result of the signal processing processes may by the device 1 on a signal line 14 a correspondingly processed (output) signal S _{out is} output.

In alternative variants, not shown here, instead of a single input signal S _in , several (for example two, three or more) input signals S _in which are used over several (eg two, three or three input signals S _in) can also be used more) of the signal line 7 corresponding signal lines in the device 1 be entered.

Alternatively or additionally, from the device 1 instead of a single output signal S _out several (e.g., two, three or more.) - from the signal processing of the one or more input signals S _in resulting - S are output _out output signals (e.g. B. on two, three or more of the signal line 14 corresponding signal lines).

How out 1 is apparent in the present embodiment via a signal line 6 an additional - used to compensate for disturbances or for temperature compensation - reference signal S _ref in the device 1 entered.

As a reference signal S _ref is used as a temperature-independent signal, for. B. a generated by a circuit with band gap reference signal.

The reference signal S _ref serves to be able to represent in a reasonable manner-in particular dimensionless-a transmission characteristic which is explained in more detail below-possibly nonlinear.

According to figure that is the above-mentioned signal line 6 the device 1 supplied reference signal S _ref in a reference signal generation block 4 entered.

With the help of the reference signal generation block 4 from the input (single) reference signal S _ref several - here: two - different internal reference signals S _{ref_a} , S _{ref_b} generated.

The internal reference signals S _{ref_a} , S _{ref_b} may have a certain temperature dependence; This is for the functioning of the device 1 irrelevant, as long as this temperature dependence for both internal reference signals S _{ref_a} , S _{ref_b} each have the same type or - relatively considered - is identical.

As internal reference signals S _{ref_a} , S _{ref_b} may be derived from the reference signal generation block 4 z. B. two streams are provided, each having different orders of magnitude, but relatively seen the same course over the temperature (and of two corresponding, in the reference signal generating block 4 provided reference signal generating means 15 . 16 be generated).

How out 1 Further, the internal reference signal S _{ref_a} from the reference signal generation block 4 off via a signal line 8th a nonlinear function block 2 additionally, via the above-mentioned signal line 7 - The above-mentioned input signal S _{in is} supplied.

In the non-linear function block 2 the signals S _in , S _{ref_a are subjected to} a signal processing process described in general _terms by the nonlinear function f (T, S _in , S _{ref_a} ) = f ₁ (T) f ₂ (S _in , S _{ref_a} ); as a result of the signal processing process is on the signal line 13 an intermediate output signal S _{out 'is} output.

In the above-mentioned function f ₁ (T) f ₂ (S _in , S _{ref_a} ), the function factor f ₁ (T) characterizes the (forcibly) given temperature dependency of the internal signals during the formation of the nonlinear function.

For example, nonlinear logarithmization generated via bipolar diodes across the temperature voltage kT / q is temperature dependent (where k is the Boltzmann constant, T is the absolute temperature, and q is the elementary charge).

The above-mentioned, the temperature dependence - generally - characteristic function factor f ₁ (T) is generally defined by a mathematically relatively difficult to model function.

The larger the respective temperature range considered, the higher the complexity of the function underlying the function factor f ₁ (T) can be.

In the above-mentioned case of a logarithmization achieved with the aid of the use of bipolar diodes, the following applies (at relatively low temperatures or relatively low operating currents): f ₁ (T) = kT / q

In other words, the temperature dependency characteristic function factor f ₁ (T) of the above, in this case, the in the non-linear function block 2 carried out signal processing process descriptive nonlinear function f (T, S _in , S _{ref_a} ) formed by the _{above-mentioned} temperature _voltage kT / q.

In the case of higher operating currents, the track resistances must also be taken into account, so that f ₁ (T) can be further complicated in this case.

To compensate for the temperature dependence of the nonlinear function block described by the function factor f ₁ (T) 2 provided intermediate output signal S _out 'this - as in 1 is shown - via the above signal line 13 a compensation block 3 fed.

Um - alone with the help of the compensation block 3 - To achieve an ideal temperature compensation, would have in the compensation block 3 a signal processing process is performed, which is defined with a reverse function to the above-described temperature dependence function f ₁ (T).

As further explained below with reference to FIGS 2 and 3 described circuit arrangement, the attempt of a compensation of the above, the temperature dependence descriptive function f ₁ (T) by means of a reverse function 1 / f ₁ (T) i. A. the occurrence of further, undesirable, by a non-linear function k (T, Θ (T)) describable influencing factors.

These influencing factors are temperature-dependent, and due to the fact that the above-mentioned inverse function 1 / f ₁ (T) can not be directly derived directly from the above-mentioned function f ₁ (T), also by other - in turn temperature-dependent - by a function Θ (T) describable disturbing influences.

The disturbing influences or interference parameters Θ are generally inherent in the system and are connected with the realization of the system.

Disturbing or disturbing parameters can z. B. be the Bipolarstromverstärkung, which is temperature-dependent, process-dependent, (relatively strong) non-linear, and difficult to represent analytically.

How out 1 As can be seen, in the present exemplary embodiment, another signal processing block can be used to compensate for the influencing factors that can be described by the above-mentioned nonlinear function k (T, Θ (T)) 5 intended.

The further signal processing block 5 is - via a signal line 9 - the above, from the reference signal generation block 4 (More precisely, from the reference signal generating means 15 ) generated (further) internal reference signal S _{ref_b} .

In the signal processing block 5 a signal processing process which can be described by a function 1 / k (T, Θ (T)) which reverses the above-mentioned interference function k (T, Θ (T)) is carried out.

In this to the interference function k (T, Θ (T)) reverse function 1 / k (T, Θ (T)) is advantageous the above, in the non-linear functional block 2 carried out signal processing process descriptive function function factor f ₁ (T) not included.

The physical effect (s) leading to the function factor f ₁ (T) is / are therefore dependent on the above-mentioned disturbance influencing factors which can be described by the nonlinear function k (T, Θ (T)). Factors decoupled.

As an example, z. B. the temperature voltage of a bipolar diode and the current gain of a bipolar transistor are given, which are fundamentally subject to different physical laws.

That - as a result of the signal processing block 5 performed, by the function 1 / k (T, Θ (T)) described signal processing process generated on a signal line 11 provided - signal S 'is - together with that of the non-linear function block 2 on the signal line 13 provided intermediate output signal S _out '- the compensation block 3 fed.

With the in the compensation block 3 performed, by the function k (T, Θ (T)) / f ₁ (T) described signal processing process can now - as described below with reference to the 2 and 3 described circuitry is described in more detail - for the non-linear function block 2 performed, non-linear signal processing process an accurate temperature compensation can be performed.

Essential is the use of a - as simple as possible - compared to the (unknown), the temperature dependence of the nonlinear functional block 2 performed signal processing process characteristic function f ₁ (T) other temperature-dependent laws following function k (T, Θ (T)), which - together with the above-mentioned inverse function 1 / f ₁ (T) - that of the compensation block 3 signal processing process characterizing function k (T, Θ (T)) / f ₁ (T) forms to compensate for disturbances in the above - the actual, desired signal processing process characterizing - function f ₂ (S _in , S _{ref_a} ).

In 2 is a schematic, exemplary detail representation of a circuit arrangement 100 shown in the above based on 1 described compensation-reason principle is realized.

The circuit arrangement 100 is used for logarithmizing currents, and has - in addition to the actual, the current-logarithmic function performing (ie performing a non-linear signal processing process, or the function of in 1 shown nonlinear function block 2 fulfilling) circuit parts - including the function of in 1 shown compensation block 3 fulfilling circuit part 103 on, and one the function of in 1 shown signal processing block 5 fulfilling circuit part 105 ,

How out 2 shows, the circuit arrangement 100 a plurality of transistors TR1, TR2, TD1, TD2 serving for current logarithmization (here: the transistors 121 . 122 . 123 . 124 ).

The drain-source path of the transistors 121 . 122 is each between a - a bias current I_bias providing - power source device 125 . 126 , and the supply voltage VDD switched.

The gate of the transistor 121 respectively. 122 is in each case connected to the collector-emitter path of the transistor 123 . 124 connected, and with a lead 107 . 108 ,

The emitters of the transistors 123 . 124 are - over a wire 127 respectively. 128 To a voltage source providing a bias voltage U_bias 129 connected.

On the line 107 is present - the input signal of the circuit arrangement 100 representing - current I _in on, and on the line 108 a - acting as a reference signal - current I _{ref_a} .

The transistors 123 . 124 are connected as diodes; the transistors 121 . 122 serve to the collector and base potentials of the transistors 123 . 124 to keep constant.

The of the circuit arrangement 100 performed (in particular by the transistors connected as diodes 123 . 124 effected) Current logarithmation is (forcibly - and not desired -) temperature dependent. The temperature dependence can be described by the function f ₁ (T) = kT / q, ie by a temperature voltage of the transistors connected as diodes 123 . 124 descriptive function (where k is the Boltzmann constant, T is the absolute temperature, and q is the elementary charge).

To compensate for the temperature dependence of the function of the in 1 shown compensation block 3 fulfilling circuit part 103 who - like out 2 shows - several transistors TV1, TV2, TV3, TV4 (here: several transistors 131 . 132 . 133 . 134 ), and a plurality of resistors 135 . 136 ,

The - by the circuit part 103 (in particular the transistors 131 . 132 . 133 . 134 , and the resistances 135 . 136 ) - Temperature dependency compensation is - again - based on the temperature voltage; This ensures that the temperature errors are kept relatively small.

How out 2 indicates is the base of the transistor 133 respectively. 134 - about the resistance 135 respectively. 136 - with the base of the transistor 131 respectively. 132 connected, and is the base of the transistor 131 respectively. 132 - Each with a further resistor - with the base of the transistor 123 respectively. 124 connected.

Furthermore, the base of the transistor 133 with the base of the transistor 134 connected.

The collector of the transistor 133 is at the collector of the transistor 131 , and to a line 138 connected to the - as (first) output signal of the circuit arrangement 100 - A current I _{1 is} output.

Similarly, the collector of the transistor is similar 134 to the collector of the transistor 132 , and to a line 139 connected to the - as (second) output signal of the circuit arrangement 100 - A current I _{2 is} output.

The emitters of the transistors 131 . 132 . 133 . 134 are with a lead 137 connected, through which a current I _K flows.

Um - alone with the help of the circuit part 103 - To achieve an ideal temperature compensation, would have to be carried out with the aid of a signal processing process, which - exactly - with a descriptive of the above-mentioned temperature dependence function f ₁ (T) function 1 / f ₁ (T) is defined.

This is only approximately the case; the use of the above-mentioned compensation circuit part 103 leads to the occurrence of further undesirable factors which can be described by a nonlinear function k (T, Θ (T)).

These influencing factors are temperature-dependent, and due to the fact that the above-mentioned inverse function 1 / f ₁ (T) can not be directly derived directly from the above-mentioned function f ₁ (T), also by other - in turn temperature-dependent - by a function Θ (T) describable disturbing influences.

As the above, on the lines 138 . 139 adjacent currents I ₁ , I ₂ temperature-independent to represent the non-linear function, can (additional, temperature-compensating) control of the line 137 applied (output) current I _K does not take place via the same currents, since these would then in turn be temperature-dependent. Instead, to generate the output current I _K, the in 2 shown - the function of in 1 shown signal processing block 5 satisfying - circuit part 105 is used (by means of which a signal processing process described by a function 1 / k (T, Θ (T)) reversible to the above-mentioned function k (T, Θ (T)) is carried out).

This makes it possible, the above (by the circuit part 103 caused) - additional - influencing factors or process dependencies, such as the finite current gain of the transistors 131 . 132 . 133 . 134 to eliminate exactly.

In the present embodiment are the - by the o. G. Function Θ (T) writable - Interference directly related to the current gain.

It is true that: Θ (T) = β (T) / (β (T) + 1)

In the present embodiment is - as out 2 emerges - in the circuit part 105 a reference transistor 140 (Reference transistor TCOMP) used, which is supplied with a temperature-stable collector current, which has a temperature-dependent emitter current result.

The collector of the transistor 140 is with a lead 141 connected to the one acting as a reference signal current I _{ref_b} is applied.

Furthermore, it is an operational amplifier 142 provided, whose plus input with the above-mentioned line 141 , and thus with the collector of the transistor 140 is connected, and its negative input to the base of the transistor 140 connected.

The output of the operational amplifier 142 is over a line 143 to the base of the transistor 140 fed back.

The emitter of the transistor 140 is over a line 144 to the source-drain path of a first transistor 145 a current mirror circuit 147 connected.

In a similar similar - mirror image - way is the above (output) line 137 the circuit arrangement 100 to the source-drain path of a second transistor 146 the current mirror circuit 147 connected.

The gates of the transistors 145 . 146 are connected together, and both transistors are connected to ground.

In the illustration above, the current gain has been cited as an example of the interference to be compensated-merely by way of example. Alternatively or additionally, it is possible, using the above-explained compensation principle, any other non-linear temperature-dependent interference such. B. early effects, etc. to compensate.

In 3 is a schematic, exemplary detail representation of another - similar to the in 2 shown circuit arrangement 100 built - circuit arrangement 200 shown in the above based on 1 described compensation-reason principle is realized.

The circuit arrangement 200 serves - also - for the logarithm of currents, and has - in addition to the actual, the current-logarithmic function performing (ie performing a non-linear signal processing process, or the function of in 1 shown nonlinear function block 2 fulfilling) circuit parts ia the function of the in 1 shown compensation block 3 fulfilling circuit part 203 on, and one the function of in 1 shown signal processing block 5 fulfilling circuit part 205 ,

How out 3 shows, the circuit arrangement 200 several - serving for current logarithming (and correspondingly similar to the circuit arrangement 100 interconnected) - transistors TR1, TR2, TD1, TD2 (here: the transistors 221 . 222 . 223 . 224 ).

The of the circuit arrangement 200 performed (in particular by as diodes switched transistors 223 . 224 effected) Current logarithmation is (forcibly - and not desired -) temperature dependent. The temperature dependence can be described by the function f ₁ (T) = kT / q, ie by a temperature voltage of the transistors connected as diodes 223 . 224 descriptive function (where k is the Boltzmann constant, T is the absolute temperature, and q is the elementary charge).

To compensate for the temperature dependence of the function of the in 1 shown compensation block 3 fulfilling circuit part 203 who - like out 3 shows - several (as in the circuit arrangement 100 interconnected) transistors TV1, TV2, TV3, TV4 (here: several transistors 231 . 232 . 233 . 234 ), and a plurality (corresponding to the circuit arrangement 100 interconnected) resistors 235 . 236 ,

How out 3 indicates is the base of the transistor 233 respectively. 234 - about the resistance 235 respectively. 236 - with the base of the transistor 231 respectively. 232 connected, and is the base of the transistor 231 respectively. 232 - Each with a further resistor - with the base of the transistor 223 respectively. 224 connected.

The collector of the transistor 233 is at the collector of the transistor 231 connected, and to a line 238 , on the - as (first) output signal of the circuit arrangement 200 - A current I _{1 is} output.

Similarly similar is the collector of the transistor 234 to the collector of the transistor 232 connected, and to a line 239 , at the - as (second) output signal of the circuit arrangement 200 - A current I _{2 is} output.

The emitters of the transistors 231 . 232 . 233 . 234 are with a lead 237 connected, at which a current I _K is present.

How out 3 shows, the circuit arrangement 200 - Compared to the circuit arrangement 100 - An additional transistor 260 (Transistor TOFFS).

The base of the transistor 260 is with the base of the transistor 234 , and with the base of the transistor 233 connected.

Furthermore, the collector of the transistor 260 to the above mentioned line 238 connected; the emitter of the transistor 260 is with a lead 261 connected.

The - the function of in 1 shown signal processing blocks 5 satisfying - circuit part 205 has a reference transistor 240 (Reference transistor TCOMP), which is supplied with a temperature-stable collector current, which has a temperature-dependent emitter current result.

The collector of the transistor 240 is with a lead 241 connected to the one acting as a reference signal current I _{ref_b} is applied.

Furthermore, in the circuit part 205 an operational amplifier 242 provided, whose plus input with the above-mentioned line 241 , and thus with the collector of the transistor 240 is connected, and its negative input to the base of the transistor 240 connected.

The output of the operational amplifier 242 is over a line 243 to the base of the transistor 240 fed back.

The emitter of the transistor 240 is over a line 244 to the source-drain path of a first transistor 245 a current mirror circuit 247 connected.

In a correspondingly similar - mirror-like - way is the above - with the emitters of the transistors 231 . 232 . 233 . 234 verbumdene - (output) line 237 the circuit arrangement 200 to the source-drain path of a second transistor 246 the current mirror circuit 247 connected, and is the above - with the emitter of the transistor 260 connected - line 261 to the source-drain path of a third transistor 250 the current mirror circuit 247 connected.

The gates of the transistors 245 . 246 . 250 are interconnected, and the transistors 245 . 246 . 250 each connected to ground.

With the in 3 shown circuit arrangement 200 is shown, as the above explained compensation principle to one of the above-mentioned current I ₁ additive, through the transistor 260 applied offset current is applied.

How out 3 As can be seen, the current gain of the transistor 260 be included in the compensation in a corresponding manner, as the current gain of the transistors 231 . 232 . 233 . 234 ,

LIST OF REFERENCE NUMBERS

1

contraption

2

Non-linear function block

3

Compensation block

4

Reference signal generation block

5

Signal processing block

6

Signal line

7

Signal line

8th

Signal line

9

Signal line

10

Signal line

11

Signal line

12

Signal line

13

Signal line

14

Signal line

15

Reference signal generation means

16

Reference signal generation means

100

circuitry

103

circuit part

105

circuit part

107

management

108

management

121

transistor

122

transistor

123

transistor

124

transistor

125

Current source means

126

Current source means

127

management

128

management

129

voltage source

131

transistor

132

transistor

133

transistor

134

transistor

135

resistance

136

resistance

137

management

138

management

139

management

140

reference transistor

141

management

142

operational amplifiers

143

management

144

management

145

transistor

146

transistor

147

Current mirror circuit

200

circuitry

203

circuit part

205

circuit part

221

transistor

222

transistor

223

transistor

224

transistor

231

transistor

232

transistor

233

transistor

234

transistor

235

resistance

236

resistance

237

management

238

management

239

management

240

reference transistor

241

management

242

operational amplifiers

243

management

244

management

245

transistor

246

transistor

247

Current mirror circuit

250

transistor

260

transistor

261

management

Claims (13)

System ( 1 . 100 . 200 ) with disturbance compensation, comprising: a device ( 3 . 103 . 203 ) to compensate for the system ( 1 . 100 . 200 ) influencing disturbances, in particular for temperature compensation; and another device ( 5 . 105 ) for compensation by the disturbance compensation device ( 3 . 103 ) additionally the system ( 1 . 100 . 200 ) influencing disturbances, wherein the further device ( 5 . 105 ) a transistor ( 140 ), and an operational amplifier ( 142 ), in which a first input to a control input of the transistor ( 140 ), an output to the control input of the transistor ( 140 ) is fed back, and a second input to a collector of the transistor ( 140 ) connected. System ( 1 . 100 . 200 ) according to claim 1, wherein the system ( 1 . 100 . 200 ) is a nonlinear system. System ( 1 . 100 . 200 ) according to one of the preceding claims, wherein in the disturbance compensation device ( 3 . 103 . 203 ) the compensation of disturbances is based on one or more physical effects, and in which in the further disturbance compensation device ( 5 . 105 ) the compensation of disturbances is based on one or more further physical effects, which of the physical effect (s) on which the disturbance compensation device (s) ( 3 . 103 ) the compensation of disturbance variables are different. System ( 1 . 100 . 200 ) according to one of the preceding claims, which comprises a non-linear function block ( 2 ) into which one or more input signals (S _in ) are input, which are inputted through the non-linear function block (S). 2 ) is or will undergo a nonlinear signal processing process. System ( 1 . 100 . 200 ) according to claim 4, in which the nonlinear functional block ( 2 ) performed nonlinear signal processing process is a current-logarithmier process. System ( 1 . 100 . 200 ) according to one of claims 4 or 5, in which in the non-linear functional block ( 2 ) additionally one or more reference signals (S _{ref_a} ) are input. System ( 1 . 100 . 200 ) according to one of the preceding claims, in which in the further device ( 5 . 105 ) for compensation by the disturbance compensation device ( 3 . 103 . 203 ) additionally the system ( 1 . 100 . 200 ) influencing disturbances one or more reference signals (S _{ref_b} ) are entered. System ( 1 . 100 . 200 ) according to claim 7, wherein the one or more in the further disturbance compensation device ( 5 . 105 ) input reference signals (S _{ref_b} ), and the one or more in the non-linear function block (S 2 ) input reference signals (S _{ref_a} ) from a reference signal generating means ( 4 ) are generated from one and the same input reference signal (S _ref ). System ( 1 . 100 . 200 ) according to one of claims 4 to 8, in which one of the non-linear functional block ( 2 ) provided output signal (S _{out '} ) to the disturbance compensation device ( 3 . 103 . 203 ) is forwarded. System ( 1 . 100 . 200 ) according to one of the preceding claims, in which one of the further disturbance compensation device ( 5 . 105 ) provided output signal (S ') to the disturbance compensation device ( 3 . 103 . 203 ) is forwarded. Method for compensation of disturbance variables, or for temperature compensation, comprising the steps: - Compensation of a signal processing system ( 1 . 100 . 200 ) influencing disturbances using a disturbance compensation device ( 3 . 103 . 203 ); and compensation by the disturbance compensation device ( 3 . 103 . 203 ) additionally the system ( 1 . 100 . 200 ) influencing disturbances by means of a further device ( 5 . 105 ), which is a transistor ( 140 ), and an operational amplifier ( 142 ), in which a first input to a control input of the transistor ( 140 ), an output to the control input of the transistor ( 140 ) is fed back, and a second input to a collector of the transistor ( 140 ) connected. The method of claim 11, wherein the signal processing system ( 1 . 100 . 200 ) is a nonlinear system. Method according to claim 11 or 12, wherein in the disturbance compensation device ( 3 . 103 . 203 ) the compensation of disturbances is based on one or more physical effects, which are different from the physical effects on which the compensation by the disturbance compensation device ( 3 . 103 . 203 ) additionally the system ( 1 . 100 . 200 ) influencing disturbances is based.

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