公开(公告)号：US20240223170A1

公开(公告)日：2024-07-04

申请号：US18092091

申请日：2022-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Michael Henderson PERROTT

IPC: H03K5/14 ,  H03K5/00 ,  H03L7/08

CPC classification number: H03K5/14 ,  H03K5/00006 ,  H03L7/0807

Abstract: In some examples, an apparatus includes a delay-based frequency multiplier and an error detection circuit. The delay-based frequency multiplier has a clock input, a multiplier clock output, and a delay calibration input. The error detection circuit has a detection input and a detection output. The detection input is coupled to the multiplier clock output, and the detection output is coupled to the delay calibration input. The error detection circuit is configured to receive a clock signal at the detection input, and provide a period error signal at the detection output based on a time difference between a first edge of the clock signal and a second edge of a delayed version of the clock signal.

公开(公告)号：US20230035350A1

公开(公告)日：2023-02-02

申请号：US17389935

申请日：2021-07-30

Applicant: Texas Instruments Incorporated

Inventor： Bichoy BAHR ,  Michael Henderson PERROTT ,  Baher HAROUN ,  Swaminathan SANKARAN

IPC: H03B5/32 ,  G06F1/04

Abstract: An oscillator circuit includes a first BAW oscillator, a first coupling stage, a second BAW oscillator, and a second coupling stage. The first BAW oscillator is configured to generate a first output signal at a frequency. The first coupling stage is coupled to the first BAW oscillator, and is configured to amplify the first output signal. The second BAW oscillator is coupled to the first coupling stage, and is configured to generate a second output signal at the frequency. The second output signal differs in phase from the first output signal. The second coupling stage is coupled to the first BAW oscillator and the second BAW oscillator, and is configured to amplify the second output signal and drive the first BAW oscillator.

公开(公告)号：US20240223201A1

公开(公告)日：2024-07-04

申请号：US18193870

申请日：2023-03-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Michael Henderson PERROTT

IPC: H03M1/10 ,  G04F10/00 ,  H03K5/13

CPC classification number: H03M1/1033 ,  G04F10/005 ,  H03K5/13 ,  H03K2005/00019

Abstract: In one example, an apparatus includes a MM divider having a clock input, a first divisor input and a MM divider output; a delta-sigma modulator having a second divisor input, a divisor output and a residual output, the divisor output coupled to the first divisor input; a DTC having a clock input, a control input, a calibration input, and an output, the DTC control input coupled to the residual output, and the DTC clock input coupled to the MM divider output; and a calibration circuit having a first calibration control input, a second calibration control input, and a calibration output, the first calibration control input coupled to the DTC output, the second calibration control input coupled to the residual output, and the calibration output coupled to the DTC calibration input.

公开(公告)号：US20230170877A1

公开(公告)日：2023-06-01

申请号：US17537776

申请日：2021-11-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jeronimo SEGOVIA-FERNANDEZ ,  Bichoy BAHR ,  Ting-Ta YEN ,  Michael Henderson PERROTT ,  Zachary SCHAFFER

IPC: H03H9/17 ,  H03H9/13 ,  H03H9/02

CPC classification number: H03H9/175 ,  H03H9/131 ,  H03H9/02015

Abstract: A tunable bulk acoustic wave (BAW) resonator includes: a first electrode adapted to be coupled to an oscillator circuit; a second electrode adapted to be coupled to the oscillator circuit; and a piezoelectric layer between the first electrode and the second electrode; and a Bragg mirror. The Bragg mirror has: a metal layer; and a dielectric layer between the metal layer and either of the first electrode or the second electrode. The tunable BAW resonator also includes: a radio-frequency (RF) signal source having a first end and a second end, the first end coupled to the first electrode, and the second end coupled to the second electrode; and an amplifier circuit between either the first electrode or the second electrode and the Bragg mirror metal layer.

公开(公告)号：US20230063409A1

公开(公告)日：2023-03-02

申请号：US17463406

申请日：2021-08-31

Applicant: Texas Instruments Incorporated

Inventor： Michael Henderson PERROTT ,  Ting-Ta YEN ,  Bichoy BAHR ,  Baher S. HAROUN

IPC: H03B5/32 ,  H03B5/04 ,  H03L7/099 ,  H03L7/093

Abstract: A temperature compensated oscillator circuit includes a first oscillator, a second oscillator, a first divider, a second divider, a frequency ratio circuit, and a temperature compensation circuit. The first divider is coupled to the first oscillator, and is configured to divide a frequency of a first oscillator signal generated by the first oscillator. The second divider is coupled to the second oscillator, and is configured to divide a frequency of a second oscillator signal generated by the second oscillator. The frequency ratio circuit is coupled to the first divider and the second divider, and is configured to determine a frequency ratio of an output of the first divider to an output of the second divider. The temperature compensation circuit is coupled to the frequency ratio circuit and the first oscillator, and is configured to generate a compensated frequency based on the frequency ratio and the first oscillator signal.

公开(公告)号：US20220224344A1

公开(公告)日：2022-07-14

申请号：US17573323

申请日：2022-01-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Michael Henderson PERROTT

IPC: H03L7/087 ,  H03L7/197

Abstract: In some examples, a circuit includes a clock divider and a calibration circuit coupled to the clock divider. The clock divider includes digital-to-time converter (DTC). The calibration circuit configured to determine a gain error and a parametric integrated nonlinearity (INL) error of the DTC, determine a gain adjustment value and a INL adjustment value to compensate for the gain error and the INL error, and modify operation of the DTC according to the gain adjustment value and the INL adjustment value to correct for the gain error and the INL error.