1. An error correcting method for a pipeline analog-to-digital converter (ADC), the pipeline ADC having a plurality of analog-to-digital conversion units cascaded in series to form a pipeline, the method comprising the following steps:
during a first mode, measuring the plurality of analog-to-digital conversion units utilizing an extra analog-to-digital conversion module;
calculating a plurality of correction constant sets according to digital output values of the extra analog-to-digital conversion module in the measuring step; and
during a second mode, correcting output signals of the plurality of analog-to-digital conversion units according to the correction constant sets.
2. The method of claim 1, wherein the extra analog-to-digital conversion module comprises a sigma-delta ADC.
3. The method of claim 1, wherein the step of calculating the plurality of correction constant sets further comprises:
performing calculations for removing errors between the extra analog-to-digital conversion module and the pipeline.
4. The method of claim 1, wherein the step of calculating the plurality of correction constant sets further comprises:
corresponding to each analog-to-digital conversion unit, performing calculations for compensating for influence of errors of later stages in the pipeline.
5. A digitally calibrated pipeline analog-to-digital converter (ADC) for converting an analog input signal into a digital output signal, the pipeline ADC comprising:
a plurality of analog-to-digital conversion units cascaded in series forming a pipeline and including a plurality of digital output ends;
an extra analog-to-digital conversion module coupled to the pipeline for measuring the plurality of analog-to-digital conversion units during a first mode; and
a correction unit coupled to the analog-to-digital conversion units and the extra analog-to-digital conversion module for correcting signals at the digital output ends during a second mode according to results of the measurement performed by the extra analog-to-digital conversion module to generate the digital output signal.
6. The pipeline ADC of claim 5, wherein the extra analog-to-digital conversion module comprises a sigma-delta ADC.
7. The pipeline ADC of claim 5, further comprising:
a multiplexer coupled between the pipeline and the extra analog-to-digital conversion module.
8. The pipeline ADC of claim 5, further comprising:
a calculation unit coupled to the extra analog-to-digital conversion module for calculating a plurality of correction constant sets according to the results of the measurement performed by the extra analog-to-digital conversion module.
9. The pipeline ADC of claim 8, wherein the calculation unit performs calculations for removing errors between the extra analog-to-digital conversion module and the pipeline.
10. The pipeline ADC of claim 5, wherein the calculation unit performs calculations for compensating for influence of errors of lower stages in the pipeline for each analog-to-digital conversion unit.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A dual fuel heater comprising:
a housing at least partially defining the dual fuel heater;
a combustion chamber within the housing for combustion of either the first gas, liquid, or combination thereof or the second gas, liquid, or combination thereof;
at least one nozzle configured to direct either the first gas, liquid, or combination thereof or the second gas, liquid, or combination thereof to the combustion chamber;
a first oxygen depletion sensor nozzle configured to deliver the first gas, liquid, or combination thereof for combustion at or near the combustion chamber;
a first electrode configured to instigate combustion of the first gas, liquid, or combination thereof from the first oxygen depletion sensor nozzle;
a second oxygen depletion sensor nozzle configured to deliver a second gas, liquid, or combination thereof for combustion, the first gas, liquid, or combination thereof being different from the second gas, liquid, or combination thereof at or near the combustion chamber;
a second electrode configured to instigate combustion of the second gas, liquid, or combination thereof from the second oxygen depletion sensor nozzle;
a frame for positioning the first oxygen depletion sensor nozzle, the first electrode, the second oxygen depletion sensor nozzle, and the second electrode all within the housing, wherein the frame positions the first electrode closer to the first oxygen depletion sensor nozzle than to the second oxygen depletion sensor nozzle and the frame positions the second electrode nearer to the second oxygen depletion sensor nozzle than to the first oxygen depletion sensor nozzle; and
an igniter switch to activate the first and second electrodes;
wherein the frame is attached to the combustion chamber to position the first oxygen depletion sensor nozzle, the first electrode, the second oxygen depletion sensor nozzle, and the second electrode in proximity to the combustion chamber within the housing.
2. The dual fuel heater of claim 1, wherein the first and second electrodes are piezoelectric igniters.
3. The dual fuel heater of claim 1, wherein the first oxygen depletion sensor nozzle comprises a first injector.
4. The dual fuel heater of claim 3, wherein the second oxygen depletion sensor nozzle comprises a second injector.
5. The dual fuel heater of claim 1, wherein the first oxygen depletion sensor nozzle comprises a first air inlet aperture.
6. The dual fuel heater of claim 5, wherein the second oxygen depletion sensor nozzle comprises a second air inlet aperture.
7. The dual fuel heater of claim 6, wherein the second air inlet aperture is larger than the first.
8. The dual fuel heater of claim 1, wherein the housing comprises a window configured to allow at least one of heated air and radiant energy to pass therethrough.
9. A dual fuel heater comprising:
a housing at least partially defining the dual fuel heater;
a combustion chamber connected to the housing;
a nozzle configured to direct either a first fuel or a second fuel to the combustion chamber;
an oxygen depletion sensor (ODS) system comprising:
a first ODS nozzle configured for the first fuel;
a first electrode configured to instigate combustion of the first fuel;
a second ODS nozzle configured for the second fuel, the first fuel being different from the second fuel;
a second electrode configured to instigate combustion of the second fuel;
a frame for positioning the first ODS nozzle, the first electrode, the second ODS nozzle, and the second electrode, wherein the frame positions the first electrode closer to the first ODS nozzle than to the second ODS nozzle and the frame positions the second electrode nearer to the second ODS nozzle than to the first ODS nozzle; and
an igniter switch to activate the first and second electrodes;
wherein the ODS system is attached to the combustion chamber so that the first ODS nozzle, the first electrode, the second ODS nozzle, and the second electrode are all adjacent the combustion chamber.
10. The dual fuel heater of claim 9, wherein the first and second electrodes are piezoelectric igniters.
11. The dual fuel heater of claim 9, wherein the first ODS nozzle comprises a first air inlet aperture.
12. The dual fuel heater of claim 11, wherein the second ODS nozzle comprises a second air inlet aperture, wherein the second air inlet aperture is larger than the first.
13. The dual fuel heater of claim 9, wherein the housing comprises a window configured to allow at least one of heated air and radiant energy to pass therethrough.
14. A dual fuel heating assembly comprising:
a housing at least partially defining the dual fuel heater;
a combustion chamber coupled to the housing;
a nozzle configured to direct either a first fuel or a second fuel different from the first to the combustion chamber;
a first oxygen depletion sensor (ODS) nozzle configured for the first fuel;
a first igniter configured to instigate combustion of the first fuel at the first ODS nozzle;
a second ODS nozzle configured for the second fuel;
a second igniter configured to instigate combustion of the second fuel at the second ODS nozzle; and
a frame attached to the combustion chamber to position the first ODS nozzle, the first electrode, the second ODS nozzle, and the second electrode in proximity to the combustion chamber, wherein the frame secures the first ODS nozzle next to the first igniter on a first side of the frame and the second ODS nozzle next to the second igniter on a second side of the frame opposite the first side.
15. The dual fuel heating assembly of claim 14, wherein the first and second igniters are piezoelectric igniters.
16. The dual fuel heating assembly of claim 14, wherein the first side of the frame is a mirror image of the second side.
17. The dual fuel heating assembly of claim 14, wherein the housing comprises a window configured to allow at least one of heated air and radiant energy to pass therethrough.