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    Relaxation oscillator with current and voltage offset cancellation
    22.
    发明授权
    Relaxation oscillator with current and voltage offset cancellation 有权
    具有电流和电压偏移消除的松弛振荡器

    公开(公告)号：US09356554B2

    公开(公告)日：2016-05-31

    申请号：US14329939

    申请日：2014-07-12

    Applicant: Texas Instruments Incorporated

    Inventor： Kai Yiu Tam ,  Ali Kiaei ,  Baher S. Haroun

    IPC: H03K3/30 ,  H03B5/04 ,  H03K4/50 ,  H03K4/02 ,  H03B5/24

    CPC classification number: H03B5/04 ,  H03B5/24 ,  H03K3/0231 ,  H03K4/023 ,  H03K4/50 ,  H03K4/502 ,  H03K4/94

    Abstract: A relaxation oscillator reduces temperature sensitivity and phase noise at low offset frequency by periodically swapping a first current and a second current so that after the first current has been input to a first pair of circuits and the second current has been input to a second pair of circuits, the second current is input to the first pair of circuits and the first current is input to the second pair of circuits.

    Abstract translation: 松弛振荡器通过周期性交换第一电流和第二电流来降低在低偏移频率下的温度灵敏度和相位噪声，使得在第一电流已经被输入到第一对电路之后，并且第二电流已经被输入到第二对 电路，第二电流被输入到第一对电路，第一电流被输入到第二对电路。

    Self-injection locking for low-power low-phase noise oscillators
    23.
    发明授权
    Self-injection locking for low-power low-phase noise oscillators 有权

    公开(公告)号：US10541697B2

    公开(公告)日：2020-01-21

    申请号：US15690117

    申请日：2017-08-29

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Bichoy Bahr ,  Baher Haroun ,  Ali Kiaei

    IPC: H03L7/24 ,  H03K3/03 ,  H03H9/54 ,  H03K3/013

    Abstract: For producing a low-power, low-phase noise oscillating signal using a self-injection locking oscillator, examples include: producing, using an oscillator, a signal having a base frequency component and an Nth harmonic component, in which N is a selected integer and N>1; filtering the signal through a bandpass filter with Q factor ≥5, the filter configured to pass the Nth harmonic component as a filtered Nth harmonic component; and injecting the filtered Nth harmonic component into the oscillator to self-injection lock the base frequency of the signal.

    Fractional frequency clock divider with direct division
    25.
    发明授权
    Fractional frequency clock divider with direct division 有权

    公开(公告)号：US10153777B2

    公开(公告)日：2018-12-11

    申请号：US15281617

    申请日：2016-09-30

    Applicant: Texas Instruments Incorporated

    Inventor： Reza Hoshyar ,  Wenting Zhou ,  Ali Kiaei ,  Baher Haroun ,  Ahmad Bahai

    IPC: H03L7/00 ,  H03L7/197 ,  H03L7/16 ,  H03L7/18

    Abstract: Disclosed examples include fractional frequency divider circuits, including a counter to provide phase shifted pulse output signals in response to counting of an adjustable integer number NK cycles of an input clock signal, an output circuit to provide an output clock signal having a first edge between first edges of the pulse output signals, as well as a delta-sigma modulator (DSM), clocked by the second pulse output signal to receive a first predetermined value and to provide a DSM output value, and a phase accumulator to receive a step input value representing a sum of the DSM output value and a second predetermined value. The phase accumulator provides a divisor input signal to the counter, and provides a phase adjustment value to the output circuit to control the position of the first edge of the output clock signal between the first edges of the pulse output signals.

    OSCILLATOR FREQUENCY TUNING USING BULK ACOUSTIC WAVE RESONATOR
    26.
    发明申请
    OSCILLATOR FREQUENCY TUNING USING BULK ACOUSTIC WAVE RESONATOR 有权

    公开(公告)号：US20170149386A1

    公开(公告)日：2017-05-25

    申请号：US14947424

    申请日：2015-11-20

    Applicant: Texas Instruments Incorporated

    Inventor： Baher S. Haroun ,  Ali Kiaei ,  Kai Yiu Tam

    IPC: H03B5/36 ,  H03L1/02

    CPC classification number: H03B5/364 ,  H03B5/326 ,  H03K3/0231 ,  H03L1/02 ,  H03L7/085 ,  H03L7/099 ,  H03L2207/50

    Abstract: The systems and methods of oscillator frequency tuning using a bulk acoustic wave resonator include a relaxation oscillator, a BAW oscillator, a frequency counter, and an adjustment module. The BAW oscillator provides an accurate time reference even over temperature changes. The BAW oscillator is turned on periodically and the relaxation oscillator is calibrated with the BAW oscillator. A temporary and periodic enablement of the BAW oscillator maintains a low current consumption. The frequency counter counts a number of full periods of the BAW oscillator that occur in one period of the relaxation oscillator. Since each frequency is known, the number of pulses of the BAW oscillator that should occur during one period of the relaxation oscillator is known. If the count is different from what should be counted, a correction may be made by adjusting an input parameter of the relaxation oscillator.

    LOW-POWER LOW-PHASE-NOISE OSCILLATOR
    28.
    发明申请
    LOW-POWER LOW-PHASE-NOISE OSCILLATOR 有权
    低功耗低噪声振荡器

    公开(公告)号：US20160301364A1

    公开(公告)日：2016-10-13

    申请号：US14682726

    申请日：2015-04-09

    Applicant: Texas Instruments Incorporated

    Inventor： Seong-Ryong Ryu ,  Ali Kiaei

    IPC: H03B5/12

    CPC classification number: H03B5/326 ,  H03B5/1212 ,  H03B5/1271 ,  H03B5/1278 ,  H03B5/30 ,  H03B5/36 ,  H03B2200/0082 ,  H03B2200/009

    Abstract: The present disclosure describes a low-power, low-phase-noise (LPLPN) oscillator. The LPLPN oscillator includes a resonator load, an amplifier stage, and a loop gain control circuit. The resonator load is structured to resonate at a primary resonant frequency. The amplifier stage is coupled with the resonator load to develop a loop gain that peaks at the primary resonant frequency. The loop gain control circuit is coupled with the amplifier stage, and it is structured to regulate the loop gain for facilitating the amplifier stage to generate an oscillation signal at the primary resonant frequency and suppress a noise signal at a parasitic parallel resonant frequency (PPRF).

    Abstract translation: 本公开描述了一种低功率，低相位噪声（LPLPN）振荡器。 LPLPN振荡器包括谐振器负载，放大器级和环路增益控制电路。 谐振器负载被构造为在初级谐振频率下谐振。 放大器级与谐振器负载耦合以产生在初级谐振频率处峰值的环路增益。 环路增益控制电路与放大器级耦合，并且其被构造为调节环路增益，以便于放大器级在初级谐振频率处产生振荡信号，并以寄生并联谐振频率（PPRF）抑制噪声信号， 。

    RELAXATION OSCILLATOR WITH CURRENT AND VOLTAGE OFFSET CANCELLATION
    29.
    发明申请
    RELAXATION OSCILLATOR WITH CURRENT AND VOLTAGE OFFSET CANCELLATION 有权
    具有电流和电压偏移消除的松弛振荡器

    公开(公告)号：US20160013753A1

    公开(公告)日：2016-01-14

    申请号：US14329939

    申请日：2014-07-12

    Applicant: Texas Instruments Incorporated

    Inventor： Kai Yiu Tam ,  Ali Kiaei ,  Baher S. Haroun

    IPC: H03B5/04 ,  H03K4/02 ,  H03B5/24 ,  H03K4/50

    CPC classification number: H03B5/04 ,  H03B5/24 ,  H03K3/0231 ,  H03K4/023 ,  H03K4/50 ,  H03K4/502 ,  H03K4/94

    Abstract: A relaxation oscillator reduces temperature sensitivity and phase noise at low offset frequency by periodically swapping a first current and a second current so that after the first current has been input to a first pair of circuits and the second current has been input to a second pair of circuits, the second current is input to the first pair of circuits and the first current is input to the second pair of circuits.

    Abstract translation: 松弛振荡器通过周期性交换第一电流和第二电流来降低在低偏移频率下的温度灵敏度和相位噪声，使得在第一电流已经被输入到第一对电路之后，并且第二电流已经被输入到第二对 电路，第二电流被输入到第一对电路，第一电流被输入到第二对电路。

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