Invention Grant
- Patent Title: Pulse density modulation digital-to-analog converter with triangle wave generation
- Patent Title (中): 具有三角波产生的脉冲密度调制数模转换器
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Application No.: US14538036Application Date: 2014-11-11
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Publication No.: US09356613B1Publication Date: 2016-05-31
- Inventor: Bryan Kris
- Applicant: Microchip Technology Incorporated
- Applicant Address: US AZ Chandler
- Assignee: MICROCHIP TECHNOLOGY INCORPORATED
- Current Assignee: MICROCHIP TECHNOLOGY INCORPORATED
- Current Assignee Address: US AZ Chandler
- Agency: Slayden Grubert Beard PLLC
- Main IPC: H03M1/66
- IPC: H03M1/66 ; H03M1/06 ; H03K4/06

Abstract:
A phase accumulator style circuit generates an output stream of pulses. The density of the pulse stream is proportional to the input data value relative to the maximum value supported by the bit width of an adder. The output pulse density is representative of the desired output voltage. The pulse stream may be filtered with a resistor-capacitor (RC) low pass filter to yield an analog voltage. Faster clock rates support the use of smaller output filters that reduce circuit cost. This circuit provides triangle wave generation wherein the DAC output ramps up and down at a user specified rate (slope) between user specified maximum and minimum amplitude values. The up and down triangle wave ramp rates (up and down slopes) may be different and independent or the same.
Public/Granted literature
- US20160134295A1 PULSE DENSITY MODULATION DIGITAL-TO-ANALOG CONVERTER WITH TRIANGLE WAVE GENERATION Public/Granted day:2016-05-12
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