US 7,321,328 B1 | ||
Single bit DAC with tristate driver | ||
Todd Sutton, Del Mar, Calif. (US) | ||
Assigned to NextWave Broadband Inc., San Diego, Calif. (US) | ||
Filed on Sep. 01, 2006, as Appl. No. 11/469,782. | ||
Int. Cl. H03M 1/82 (2006.01) |
U.S. Cl. 341—152 [341/144] | 16 Claims |
1. A method of producing an analog output from a received digital input, the method comprising:
receiving a digital pulse train having an average value which is proportional to a digital conversion value;
driving the pulse train at a periodic interval to produce a modulated tristate-gate output;
averaging the modulated tristate-gate output to produce an analog signal reflective of the digital conversion value; and
driving the pulse train at a second periodic interval, the second periodic interval having a duty cycle of less than 50% so
that the modulated tristate-gate output is more often disabled than enabled.
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