Slew rate control apparatus for digital microphones
First Claim
Patent Images
1. A system comprising:
- a digital microphone configured to convert a signal to a digital signal;
a master clock;
a driver configured to produce a digital output stream based upon the digital signal from the digital microphone, the driver comprising;
an adjustable current source;
a current source controller block; and
a comparison block to the current source controller block, and configured to compare the digital output stream to a reference value at a time delayed with respect to the master clock and based upon the comparison cause the current source controller block to adjust a strength of the driver.
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Abstract
A driver, includes a driver block, a controller block, and a comparison block. The driver block includes an adjustable current source configured to produce a digital output stream. The controller block is coupled to the driver block. The comparison block is coupled to the driver block and the controller block. The comparison block is configured to compare the digital output stream to a reference value at a time delayed with respect to a master clock and based upon the comparison cause the controller block to adjust a strength of the driver block.
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Citations
20 Claims
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1. A system comprising:
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a digital microphone configured to convert a signal to a digital signal; a master clock; a driver configured to produce a digital output stream based upon the digital signal from the digital microphone, the driver comprising; an adjustable current source; a current source controller block; and a comparison block to the current source controller block, and configured to compare the digital output stream to a reference value at a time delayed with respect to the master clock and based upon the comparison cause the current source controller block to adjust a strength of the driver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of controlling a driver, the method comprising:
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receiving, from a digital microphone, a digital signal; comparing, by a comparator circuit of the driver, a digital output stream of a driver to a reference value at a time delayed with respect to a master clock, wherein the digital output stream of the driver is based upon the digital signal from the digital microphone; and based upon the comparing, causing, by an asynchronous circuit of the driver, an adjustment of a strength of the driver, the strength being a capability of the driver, the adjustment being effective to alter a settling of the digital output stream. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification