Patents by Inventor Jingdong DENG
Jingdong DENG 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).
-
Patent number: 10222817Abstract: A bandgap reference (BGR) circuit and method generates a constant voltage reference that is stable over temperature variations. The BGR circuit is composed of a proportional to absolute temperature (PTAT) stage, a complementary to absolute temperature (CTAT) stage, and an output stage interposed between the PTAT stage and the CTAT stage. The PTAT stage is configured to produce a PTAT current and the CTAT stage is configured to produce a CTAT current. The BGR circuit is configured to mirror the PTAT current and mirror the CTAT current to produce a mirrored PTAT current and a mirrored CTAT current in the output stage and the output stage is configured to combine the mirrored PTAT current and the mirrored CTAT current to generate the constant voltage reference.Type: GrantFiled: September 29, 2017Date of Patent: March 5, 2019Assignee: Cavium, LLCInventor: JingDong Deng
-
Publication number: 20190036534Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: October 5, 2018Publication date: January 31, 2019Inventors: Jingdong DENG, Rupert Shiu Chung HO, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Patent number: 10164647Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: October 20, 2017Date of Patent: December 25, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Rupert Shiu Chung Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Publication number: 20180323792Abstract: A frequency divider circuit comprises a first divider chain including at least one first divider cell and a second divider chain coupled to the first divider chain to form an extendable divider chain. The second divider chain includes at least one second divider cell with a respective reset control. An effective length of the extendable divider chain may be altered, dynamically, via the respective reset control. Altering the effective length, dynamically, enables a division ratio of the frequency divider circuit to be changed, dynamically. The frequency divider circuit may be advantageously employed by applications that rely upon a dynamic division ratio, such as a fractional-N (frac-N) phase-locked loop (PLL).Type: ApplicationFiled: May 4, 2017Publication date: November 8, 2018Inventors: JingDong Deng, Omer O. Yildirim
-
Publication number: 20180316357Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: June 20, 2018Publication date: November 1, 2018Inventors: Jingdong DENG, Chung S. HO, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Publication number: 20180316358Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: July 10, 2018Publication date: November 1, 2018Inventors: Jingdong Deng, Chung S. Ho, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Patent number: 10103739Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: September 8, 2017Date of Patent: October 16, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Chung S. Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Publication number: 20180278258Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: May 31, 2018Publication date: September 27, 2018Inventors: Jingdong Deng, Chung S. Ho, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Patent number: 10084460Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: November 22, 2017Date of Patent: September 25, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Chung S. Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Patent number: 10063243Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: August 4, 2017Date of Patent: August 28, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Chung S. Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Patent number: 9966964Abstract: An example embodiment disclosed herein enables at least one frequency divider chain of a multiphase divider circuit to ensure proper phase relations after multiple frequency divisions. Another example embodiment enables a unique reset sequence to maximize a timing margin for reset signals of the at least one frequency divider chain and, thus, maximizes a bandwidth of the multiphase divider circuit.Type: GrantFiled: May 23, 2017Date of Patent: May 8, 2018Assignee: Cavium, Inc.Inventors: Scott E. Meninger, JingDong Deng
-
Publication number: 20180083640Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: November 22, 2017Publication date: March 22, 2018Inventors: Jingdong DENG, Chung S. HO, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Patent number: 9917591Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: August 26, 2016Date of Patent: March 13, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Chung S. Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Patent number: 9906228Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: August 26, 2016Date of Patent: February 27, 2018Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Chung S. Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Patent number: 9904305Abstract: A low drop-out voltage regulator includes an error amplifier that generates an amplified error voltage, the error amplifier including a first input for receiving a reference voltage, a second input for receiving a feedback voltage, a bias terminal for receiving an adaptive bias current, and an output. A pass gate providing an output voltage includes a first input connected to a supply voltage and a second input connected to the error amplifier output. A feedback network generating the feedback voltage includes a first terminal connected to the output of the pass gate and a second terminal connected to the second input of the error amplifier. An adaptive bias network providing the adaptive bias current includes a first transistor connected to the bias terminal of the error amplifier, a second transistor connected to the first transistor as a current mirror, and a third transistor connected in parallel with the pass gate.Type: GrantFiled: April 29, 2016Date of Patent: February 27, 2018Assignee: Cavium, Inc.Inventors: Jonathan K. Brown, JingDong Deng
-
Publication number: 20180048321Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: October 20, 2017Publication date: February 15, 2018Inventors: Jingdong DENG, Chung S. HO, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Publication number: 20170373695Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: September 8, 2017Publication date: December 28, 2017Inventors: Jingdong Deng, Chung S. Ho, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Publication number: 20170338827Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: ApplicationFiled: August 4, 2017Publication date: November 23, 2017Inventors: Jingdong Deng, Chung S. Ho, David FLYE, Zhenrong JIN, Ramana M. MALLADI
-
Patent number: 9819350Abstract: A phase locked loop circuit is disclosed. The phase locked loop circuit includes a ring oscillator. The phase locked loop circuit also includes a digital path including a digital phase detector. The phase locked loop circuit further includes an analog path including a linear phase detector. Additionally, the phase locked loop circuit includes a feedback path connecting an output of the ring oscillator to an input of the digital path and an input of the analog path. The digital path and the analog path are parallel paths. The digital path provides a digital tuning signal the ring oscillator that digitally controls a frequency of the ring oscillator. The analog path provides an analog tuning signal the ring oscillator that continuously controls the frequency of the ring oscillator.Type: GrantFiled: August 26, 2016Date of Patent: November 14, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jingdong Deng, Chung S. Ho, David Flye, Zhenrong Jin, Ramana M. Malladi
-
Publication number: 20170315574Abstract: A low drop-out voltage regulator includes an error amplifier that generates an amplified error voltage, the error amplifier including a first input for receiving a reference voltage, a second input for receiving a feedback voltage, a bias terminal for receiving an adaptive bias current, and an output. A pass gate providing an output voltage includes a first input connected to a supply voltage and a second input connected to the error amplifier output. A feedback network generating the feedback voltage includes a first terminal connected to the output of the pass gate and a second terminal connected to the second input of the error amplifier. An adaptive bias network providing the adaptive bias current includes a first transistor connected to the bias terminal of the error amplifier, a second transistor connected to the first transistor as a current mirror, and a third transistor connected in parallel with the pass gate.Type: ApplicationFiled: April 29, 2016Publication date: November 2, 2017Inventors: Jonathan K. Brown, JingDong Deng