Patents by Inventor Kartika Prihadi
Kartika Prihadi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8307237Abstract: A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.Type: GrantFiled: September 25, 2011Date of Patent: November 6, 2012Assignee: Silicon Laboratories IncInventors: Kartika Prihadi, Kenneth W. Fernald
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Publication number: 20120036389Abstract: A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.Type: ApplicationFiled: September 25, 2011Publication date: February 9, 2012Inventors: Kartika Prihadi, Kenneth W. Fernald
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Patent number: 8055932Abstract: A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.Type: GrantFiled: July 1, 2008Date of Patent: November 8, 2011Assignee: Silicon Laboratories Inc.Inventors: Kartika Prihadi, Kenneth W. Fernald
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Publication number: 20080270817Abstract: A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An on-chip UART is provided for digitally communicating with an off-chip UART, which off-chip UART has an independent time reference, which communication between the on-chip UART and the off-chip UART is effected without clock recovery. The on-chip UART has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.Type: ApplicationFiled: July 1, 2008Publication date: October 30, 2008Applicant: SILICON LABS CP, INC.Inventors: KARTIKA PRIHADI, KENNETH W. FERNALD
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Patent number: 7395447Abstract: A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An asynchronous on-chip communication device is provided for digitally communicating with an off-chip asynchronous communication device, which off-chip asynchronous communication device has an independent time reference, which communication between the on-chip communication device and the off-chip asynchronous communication device is effected without clock recovery. The asynchronous on-chip communication device has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the asynchronous on-chip communication device.Type: GrantFiled: September 16, 2002Date of Patent: July 1, 2008Assignee: Silicon Labs CP, Inc.Inventors: Kartika Prihadi, Kenneth W. Fernald
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Patent number: 6980056Abstract: An attenuator includes a first stage 601a having a first operational amplifier 602a and a tapped resistor 603a. Tapped resistor 603a has an input for receiving input data, an output coupled to an output of first operational amplifier 602a, and a plurality of taps for selectively presenting a sequence of voltages to a noninverting input of first operational amplifier 602a. Each of these sequences of voltages corresponds to an attenuation step such that first stage 601a steps the attenuation produced by the attenuator from an intermediate value to a predetermined ending value. A second stage 601b includes a second operational amplifier 602b and a tapped resistor 603b. Tapped resistor 603b includes an input for receiving analog data from first stage 601a, an output coupled to an output of second operational amplifier 602b, and a plurality of taps for selectively presenting a sequence of voltages to a noninverting input of operational amplifier 602b.Type: GrantFiled: November 13, 2000Date of Patent: December 27, 2005Assignee: Cirrus Logic, Inc.Inventors: Mark Alexander, Krishnan Subramonium, Golam Chowdhury, Kartika Prihadi, Bryan Cope
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Publication number: 20040054835Abstract: A precision oscillator for an asynchronous transmission system. An integrated system on a chip with serial asynchronous communication capabilities includes processing circuitry for performing predefined digital processing functions on the chip and having an associated on chip free running clock circuit for generating a temperature compensated clock. An asynchronous on-chip communication device is provided for digitally communicating with an off-chip asynchronous communication device, which off-chip asynchronous communication device has an independent time reference, which communication between the on-chip communication device and the off-chip asynchronous communication device is effected without clock recovery. The asynchronous on-chip communication device has a time-base derived from the temperature compensated clock. The temperature compensated clock provides a time reference for both the processing circuitry and the asynchronous on-chip communication device.Type: ApplicationFiled: September 16, 2002Publication date: March 18, 2004Inventors: Kartika Prihadi, Kenneth W. Fernald
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Patent number: 6259957Abstract: Audio data processing circuitry 300 includes a plurality of analog inputs 101 for receiving analog audio data and a digital input 105 for receiving digital audio data. A analog mixer 312 mixes analog data received at said plurality of analog inputs 101 to generate a mixed analog audio stream. An analog-to-digital converter 313 converts the mixed analog audio stream to a digital audio stream and a digital mixer 315 mixes digital data received at the digital input 105 with the digital audio stream from the analog mixer 312 to generate a mixed digital audio stream.Type: GrantFiled: April 4, 1997Date of Patent: July 10, 2001Assignee: Cirrus Logic, Inc.Inventors: Mark Alexander, Krishnan Subramonium, Golam Chowdhury, Kartika Prihadi, Bryan Cope