Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2006-10-31
2006-10-31
Jeanglaude, Jean Bruner (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S143000
Reexamination Certificate
active
07129876
ABSTRACT:
A digital-analog converter includes a counter (13) for performing counting operation according to clocks (CK1, CK2), a comparator (12) for comparing the count value to a digital input value and outputting the clocks (CK1, CK2) until the values coincide, switches (SW1, SW2) which turn ON/OFF according to the clocks (CK1, CK2), and a capacitor (C1) which charges and discharges by utilizing constant current sources (21, 22) when the switches (SW1, SW2) are ON. A digital portion (10) including the comparator (12) and the counter (13) is completely separated from an analog portion (20) including the capacitor (C1) and the switches (SW1, SW2) and these portions are connected only by the clocks (CK1, CK2), so that the digital portion (10) and the analog portion (20) can be designed separately.
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Sozanski, K. P. et al. Digital Control Circuit for Class-D Audio Power Amplifier. 32nd. Annual IEEE Powers Electronics Specialist Conference, PESC 2001, Conference Proceedings, Vancouver, Canada, Jun. 17-21, 2001. Annual Power Electronics Specialist Conference, New York, New York. IEEE, U.S., vol. 1 of 4 Conf. pp. 1245-1250.
Connolly Bove & Lodge & Hutz LLP
Hume Larry J.
Jeanglaude Jean Bruner
Neuro Solution Corp.
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