Photocurrent-to-binary signal conversion apparatus capable of suppressing waveform distortion
AssigneeNEC Compound Semiconductor Devices, Ltd.
InventorKurao Nakagawa
Life of this patent
Estimating the term…
Abstract
In a photocurrent-to-binary signal conversion apparatus, a light receiving element receives a light signal so that a photocurrent in response to the light signal flows through the light receiving element. An amplifier converts the photocurrent into a detection voltage. A reference voltage generating circuit offsets the detection voltage on the side of the detection voltage to generate a reference voltage. A comparator compares the detection voltage with the reference voltage to generate a binary signal in accordance with whether or not the detection voltage is higher than the reference voltage.
Claims13
A photocurrent-to-binary signal conversion apparatus comprising:
- a light receiving element for receiving a light signal so that a photocurrent in response to said light signal flows through said light receiving element;
- an amplifier, connected to said light receiving element, for converting said photocurrent into a detection voltage;
- a reference voltage generating circuit, connected to said amplifier, for offsetting said detection voltage on the side of said detection voltage to generate a reference voltage;
- and
- a comparator, connected to said amplifier and said reference voltage generating circuit, for comparing said detection voltage with said reference voltage to generate a binary signal in accordance with whether or not said detection voltage is higher than said reference voltage.
A photocurrent-to-binary signal conversion apparatus comprising:
- a light receiving element for receiving a light signal so that a photocurrent in response to said light signal flows through said light receiving element;
- an amplifier, connected to said light receiving element, for converting said photocurrent into a detection voltage;
- a reference voltage generating circuit, connected to an intermediate stage of said amplifier, for offsetting a voltage at said intermediate stage on the side of said voltage at said intermediate stage to generate a reference voltage, said voltage at said intermediate stage having the same phase as said detection voltage;
- and
- a comparator, connected to said amplifier and said reference voltage generating circuit, for comparing said detection voltage with said reference voltage to generate a binary signal in accordance with whether or not said detection voltage is higher than said reference voltage.
Dependencies are inferred from the claim text.