D/A converter and communication apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsAkihide Sai, Takeshi Ueno, Takafumi Yamaji
Life of this patent
Estimating the term…
Abstract
A D/A converter includes a plurality of current sources configured to be on or off according to input digital data; a constant voltage source configured to apply a constant voltage to the current sources; current supply wirings provided between the constant voltage source and the respective current source, the current supply wirings respectively having equal length from the constant voltage source to the respective current source; ground-side wirings summing up output currents from the plurality of current sources; and output terminals connected to the ground-side wirings, the output terminals outputting analogue data corresponding to the input digital data.
Claims19
A D/A converter comprising:
- a plurality of current sources configured to be on or off according to input digital data;
- a constant voltage source configured to apply a constant voltage to the current sources;
- current supply wirings provided between the constant voltage source and the respective current source, the current supply wirings respectively having equal length from the constant voltage source to the respective current source;
- ground-side wirings summing up output currents from the plurality of current sources;
- and
- output terminals connected to the ground-side wirings, the output terminals outputting analogue data corresponding to the input digital data.
A D/A converter comprising:
- a plurality of current sources configured to be on or off according to input digital data;
- a ground terminal configured to be kept at ground voltage;
- ground-side wirings provided between the ground terminal and the respective current source, and respectively having equal length from the respective current source to the ground terminal;
- current supply wirings supplying current to the current sources;
- and
- output terminals connected to the current supply wirings, the output terminals outputting analogue data corresponding to the input digital data.
A communication apparatus including a D/A converter comprising:
- a plurality of current sources controlled to be on or off according to input digital data;
- a constant voltage source applying a constant voltage to the current sources;
- current supply wirings provided between the constant voltage source and the respective current source, the current supply wirings respectively having equal length from the constant voltage source to the respective current source;
- ground-side wirings summing up output currents from the plurality of current sources;
- and
- output terminals connected to the ground-side wirings, the output terminals outputting analogue data corresponding to the input digital data.
Dependencies are inferred from the claim text.