Systems and methods for digital control utilizing oversampling

• US 8,059,018 B2
• Filed: 09/08/2008
• Issued: 11/15/2011
• Est. Priority Date: 02/03/2006
• Status: Active Grant

• Current Assignee: L&L Engineering LLC (Analog Devices, Inc.)
• Original Assignee: L&L Engineering LLC (Analog Devices, Inc.)
• Inventors: Kenly, Stewart, Latham, Paul
• Primary Examiner(s): Mai; Lam T
• Application Number:
  US12/206,016
• Publication Number:
  US 20090016424A1
• Time in Patent Office: 1,163 Days
• Field of Search: 341 70- 76, 707/203, 367/14, 367/27, 367/55, 375/141, 375/145, 375/367, 375/E1.002, 340/690, 340/540, 340/669
• US Class Current: 341/76
• CPC Class Codes: H03M 3/328 using dither
• CPC Class Codes: H03M 3/344 by filtering other than the noise-shaping inherent to delta-sigma modulators, e.g. anti-aliasing
• CPC Class Codes: H03M 3/506 the final digital/analogue converter being constituted by a pulse width modulator

Abstract

Methods and systems for digital control utilizing oversampling.

Claims

1. A controller comprising:

a compensating filter component capable of receiving a digital input signal and of providing a compensated digital signal;

said compensating filter component comprising at least one predetermined parameter;

an error performance filter capable of receiving the digital input signal and of providing a performance indicative signal; and

a perturbation generating component capable of receiving the performance indicative signal and of providing values, to said compensating filter component, for said at least one predetermined parameter;

wherein

a difference between said values and preceding value of said at least one predetermined parameter being substantially small compared to said preceding value.

2. The controller of claim 1 further comprising:

an analog to digital converting component capable of receiving an analog input signal and of providing the digital input signal.

3. The controller of claim 1 wherein said error performance filter comprises a filter providing the performance indicative signal, the performance indicative signal being indicative of an absolute value of an error squared.

4. The controller of claim 1 wherein said error performance filter comprises a filter providing the performance indicative signal, the performance indicative signal being indicative of power dissipation.

5. The controller of claim 1 further comprising:

a digital pulse width modulator capable of receiving the compensated digital signal and of providing a plurality of pulse control pulses.

6. The controller of claim 5 wherein said digital pulse width modulator comprises at least one PWM predetermined parameter;

and wherein said perturbation generating component is capable of providing, to said digital pulse width modulator, values for said at least one PWM predetermined parameter.

7. The controller of claim 1 wherein said perturbation generating component generates said values utilizing random perturbations.

8. The controller of claim 1 wherein said perturbation generating component generates said values utilizing a predetermined algorithm.

9. The controller of claim 8 wherein said predetermined algorithm is a gradient search algorithm.

10. The controller of claim 1 further comprising an error injection component capable of adding an error signal to the compensated digital signal.

11. The controller of claim 1 further comprising:

a serial data transfer component capable of receiving/sending real-time data from/to a plurality of locations in the digital controller; and

a data controller component comprising;

at least one processor;

at least one computer usable medium having computer readable code embodied there in, said computer readable code being capable of causing said at least one processor to;

collect, during operation of the digital controller, real-time data from at least one location from said plurality of locations in the digital controller.