초록 ▼

An arrangement for angular measurement includes an angle sensor that supplies sensor signals phase shifted 90° with respect to each other and having actual amplitude values. A signal-processing device provides expected amplitude values of the sensor signals and graded limit values for a deviation be

An arrangement for angular measurement includes an angle sensor that supplies sensor signals phase shifted 90° with respect to each other and having actual amplitude values. A signal-processing device provides expected amplitude values of the sensor signals and graded limit values for a deviation between the expected amplitude values and the actual amplitude values of the sensor signals; compares the expected amplitude values with the actual amplitude values of the sensor signals; determines a deviation between the expected amplitude values and the actual amplitude values, and a range of values in which the determined deviation occurs; and generates an error signal including reliability class information about the range of values in which the determined deviation occurs. As a result, monitoring and evaluation of the measured sensor signals with accuracy and reliability is possible.

대표청구항 ▼

An arrangement for angular measurement includes an angle sensor that supplies sensor signals phase shifted 90° with respect to each other and having actual amplitude values. A signal-processing device provides expected amplitude values of the sensor signals and graded limit values for a deviation be

An arrangement for angular measurement includes an angle sensor that supplies sensor signals phase shifted 90° with respect to each other and having actual amplitude values. A signal-processing device provides expected amplitude values of the sensor signals and graded limit values for a deviation between the expected amplitude values and the actual amplitude values of the sensor signals; compares the expected amplitude values with the actual amplitude values of the sensor signals; determines a deviation between the expected amplitude values and the actual amplitude values, and a range of values in which the determined deviation occurs; and generates an error signal including reliability class information about the range of values in which the determined deviation occurs. As a result, monitoring and evaluation of the measured sensor signals with accuracy and reliability is possible. diodes in response to a control signal. 8. The current source of claim 7 wherein said switch is an n FET. 9. The current source of claim 7 wherein said start up circuit further comprises a clamping transistor connected to the collector of the second control transistor for selectively turning off said amplifying transistor in response to said control signal. 10. The current source of claim 9 wherein said clamping transistor is a p FET. 11. The current source of claim 7, wherein said switch is an n FET, wherein said start up circuit further comprises a p FET connected to the collector of the second control transistor for selectively turning off said amplifying transistor in response to said control signal, the current source having a control terminal for receiving a first voltage level operable to turn off said current source and a second voltage level operable to start said current source, said control terminal being connected to a control electrode of the P FET and to a gate of the n FET via an inverter. 12. The current source of claim 11 having a plurality of second conductivity type output transistors, each having an emitter connected to said power rail, a base connected to the control electrode of the sensing transistor, wherein each of said output transistors has a collector providing a respective current output. 13. The current source of claim 12 wherein at least one of said output transistors has greater width than another of said output transistors whereby said at least one output transistor provides a higher output current. 14. The current source of claim 13, wherein said first voltage level received by said control terminal is low such that said amplifying transistor causes said output transistors and the bandgap circuit to be turned off while at the same time said low first voltage level causes said n FET and said inverter to turn off said pull-up transistor. 15. The current source of claim 14, wherein said first voltage level is such that the p FET is turned on, pulling the control electrode of said amplifying transistor to said power rail and thereby turning said amplifying transistor off, wherein since no current can conduct the output transistors are turned off. 16. The current source of claim 14, wherein at said first voltage level said inverter causes the n FET to turn on thereby shorting out said plural series diodes and pulling the base of said pull-up transistor low to thereby turn off said pull-up transistor. 17. A current source, comprising: a bandgap circuit that includes first and second control transistors each having a first conduction terminal connected to a first voltage reference, a second conduction terminal connected to a second voltage reference, and a control terminal, the control terminals being connected to each other; a sensing transistor having a control terminal and a main current path between first and second conduction terminals; a feedback resistance connected between the second conduction terminal of the sensing transistor and the second voltage reference; and a current amplifier connected between the first conduction terminal of the first control transistor and the control terminal of the sensing transistor, the current amplifier including: an amplifier transistor having a main current path, and a control terminal connected to the first conduction terminal of the first control transistor; and a current mirror having a first mirror leg in series with the main current path of the amplifier transistor, and a second mirror leg coupled to the control terminal of the sensing transistor. 18. The current source of claim 17, further comprising a diode-connected transistor connected between the first voltage reference and the second mirror leg, and to the control electrode of the sensing transistor. 19. The current source of claim 17, further comprising a start up circuit that includes: a first and second resistances; and a pull-up transistor connected between the first voltage r