Mixed-signal control apparatus of modulation system

Details Mixed-signal control apparatus of modulation system Mixed-signal control apparatus of modulation system

2011-01-11

2011-01-11

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Converter is part of control loop

C341S144000, C341S155000, C341S143000

Reexamination Certificate

active

07868800

ABSTRACT:
A mixed-signal control apparatus of a modulation system is provided. The mixed-signal control apparatus includes a digital-to-analog converter (DAC) unit, an analog-to-digital converter (ADC) unit, and a processing unit. When a quantization step of the ADC unit is qADC, a quantization step of the DAC unit is qDAC, and a transfer function of the modulation system is G0, qADC≦G0qDAC. A controlled variable is finely converted by using the ADC unit having a very high resolution. In such a way, it can be ensured that data in an analog domain can be transmitted to a discrete domain with the least distortion, thus achieving a robust and simple control.

REFERENCES:
patent: 7315269 (2008-01-01), Schreier et al.
Authored by Peterchev, et al., article titled “Quantization Resolution and Limit Cycling in Digitally Controlled PWM Converters,” adopted from IEEE Transactions on Power Electronics, vol. 18, No. 1, Jan. 2003.
Authored by Peng, et al., article titled “Modeling of Quantization Effects in Digitally Controlled DC-DC Converters,” adopted from 35TH Annual IEEE Power Electronics Specialists Conference, AAchen, Germany, 2004.
Authored by Huang, et al., article titled “Dual-Section-Average(DSA) Analog-to Digital Converter(ADC) in Digital Pulse Width Modulation (DPWM) DC-DC Converter for Reducing the Problem of Limiting Cycle”, adopted from the IEEE Asian Solid-State Circuits Conference, Fukuoka, Japan, Nov. 3-5, 2008.

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