MOS active pixel sensor unit with a shutter
First Claim
1. A MOS active pixel sensor unit comprising:
- a first MOS transistor, a second MOS transistor, a third MOS transistor, and a fourth MOS transistor, wherein said third and fourth transistors are connected in series and both are provided between a variable voltage source and an output terminal, and said first and second transistors are connected in series and both are provided between said variable voltage source and the gate of said third transistor; and
a photodiode connected with said second transistor in parallel, wherein the cathode of said photodiode is coupled to a node that connects said second and third transistors, and the anode of said photodiode is connected to a node that connects said first and second transistors;
wherein said variable voltage source switches its voltage level in association with the on/off control of said first and second transistors, whereby said photodiode senses and transforms light intensity into a response signal and said response signal is outputted from said output terminal connected to said fourth transistor.
1 Assignment
0 Petitions
Accused Products
Abstract
A MOS active pixel sensor unit is disclosed which comprises: A first MOS transistor, a second MOS transistor, a third MOS transistor, and a fourth MOS transistor, wherein the third and fourth transistors are connected in series and both are provided between a variable voltage source and an output terminal, and the first and second transistors are connected in series and both are provided between the variable voltage source and the gate of the third transistor; and a photodiode connected with the second transistor in parallel, wherein the cathode of the photodiode is coupled to a node that connects the second and third transistors, and the anode of the photodiode is connected to a node that connects the first and second transistors. The variable voltage source switches its voltage level in association with the on/off control of the first and second transistors whereby the photodiode senses and transforms light intensity into a response signal and the response signal is outputted from the output terminal connected to the fourth transistor.
14 Citations
4 Claims
-
1. A MOS active pixel sensor unit comprising:
-
a first MOS transistor, a second MOS transistor, a third MOS transistor, and a fourth MOS transistor, wherein said third and fourth transistors are connected in series and both are provided between a variable voltage source and an output terminal, and said first and second transistors are connected in series and both are provided between said variable voltage source and the gate of said third transistor; and a photodiode connected with said second transistor in parallel, wherein the cathode of said photodiode is coupled to a node that connects said second and third transistors, and the anode of said photodiode is connected to a node that connects said first and second transistors; wherein said variable voltage source switches its voltage level in association with the on/off control of said first and second transistors, whereby said photodiode senses and transforms light intensity into a response signal and said response signal is outputted from said output terminal connected to said fourth transistor. - View Dependent Claims (2, 3, 4)
-
Specification