Optical sensor arrangement and method for generating an analog output signal
First Claim
1. An optical sensor arrangement, comprising:
- a light sensor that is connected to a summation node and is designed for generating a sensor current,a current source connected to the summation node and designed to provide a source current,an integrator that is coupled to the summation node and is designed for generating a first value of an integrator signal by integrating during a first phase and for generating a second value of the integrator signal by integrating during a second phase anda sum and hold circuit that is coupled to the integrator and is designed to generate an analog output signal as a function of a difference of the first value and the second value of the integrator signal.
1 Assignment
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Accused Products
Abstract
An optical sensor arrangement (10) comprises a light sensor (11) that is connected to a summation node (13) and is designed for generating a sensor current (S2), a current source (S2) connected to the summation node (13) and designed to provide a source current (S3), and an integrator (21) that is coupled to the summation node (13) and is designed for generating a first value (VP1) of an integrator signal (S6) by integrating during a first phase (P1) and for generating a second value (VP2) of the integrator signal (S6) by integrating during a second phase (P2). The optical sensor arrangement (10) comprises a sum and hold circuit (31) that is coupled to the integrator (21) and is designed to generate an analog output signal (S7) as a function of a difference of the first value (VP1) and the second value (VP2) of the integrator signal (S6).
9 Citations
15 Claims
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1. An optical sensor arrangement, comprising:
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a light sensor that is connected to a summation node and is designed for generating a sensor current, a current source connected to the summation node and designed to provide a source current, an integrator that is coupled to the summation node and is designed for generating a first value of an integrator signal by integrating during a first phase and for generating a second value of the integrator signal by integrating during a second phase and a sum and hold circuit that is coupled to the integrator and is designed to generate an analog output signal as a function of a difference of the first value and the second value of the integrator signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for generating an analog output signal, comprising:
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generating a sensor current by a light sensor and providing the sensor current to a summation node, providing a source current by a current source to the summation node, generating an integrator signal by an integrator coupled to the summation node, wherein a first value of the integrator signal is generated by integrating during a first phase and a second value of the integrator signal is generated by integrating during a second phase, and generating an analog output signal by a sum and hold circuit as a function of a difference of the first value and the second value of the integrator signal.
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Specification