D/A converter circuit, organic EL drive circuit, and organic EL display
First Claim
1. A D/A converter circuit, which includes a first current mirror circuit having a plurality of output side transistors provided correspondingly to digits of data to be converted and generates an analog current by obtaining in at least one of the output side transistors a current corresponding to weight of a digit of the data, comprising:
- a second current mirror circuit connected on an upstream or downstream side of at least one of the output side transistors corresponding to a lower digit of the data, wherein an operating current ratio of the output side transistor of the second current mirror circuit with respect to an input side transistor thereof is set to n;
1(where n is a positive integer) and the analog current is generated by obtaining a current corresponding to a weight of the lower digit, which is less than 1, on the output side transistor of the second current mirror circuit.
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Accused Products
Abstract
A D/A converter circuit includes a first current mirror circuit and a second current mirror circuit. The first current mirror circuit has a plurality of output side transistors provided correspondingly to digits of data to be converted and generates en analog current by obtaining, in at least one of the output side transistors, a current corresponding to the weight of the digit of the data being converted. The second current mirror circuit is connected on an upstream or downstream side of the output side transistors and corresponding to a lower digit of the data. An analog current is generated with the second current mirror circuit by obtaining a current corresponding to a weight of a digit that is less than 1.
14 Citations
12 Claims
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1. A D/A converter circuit, which includes a first current mirror circuit having a plurality of output side transistors provided correspondingly to digits of data to be converted and generates an analog current by obtaining in at least one of the output side transistors a current corresponding to weight of a digit of the data, comprising:
a second current mirror circuit connected on an upstream or downstream side of at least one of the output side transistors corresponding to a lower digit of the data, wherein an operating current ratio of the output side transistor of the second current mirror circuit with respect to an input side transistor thereof is set to n;
1(where n is a positive integer) and the analog current is generated by obtaining a current corresponding to a weight of the lower digit, which is less than 1, on the output side transistor of the second current mirror circuit.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
Specification