公开(公告)号：US11456751B1

公开(公告)日：2022-09-27

申请号：US17536924

申请日：2021-11-29

Applicant: Texas Instruments Incorporated

Inventor： Bichoy Bahr ,  Baher Haroun ,  Swaminathan Sankaran ,  Juan Alejandro Herbsommer

IPC: H03L7/099 ,  H03B5/32 ,  H03L7/08 ,  H03L7/14 ,  H03L7/10 ,  H03L7/06 ,  H03L1/00 ,  H03L1/02 ,  H03L7/00

Abstract: A reference frequency signal generator comprises a plurality of ovenized reference crystal oscillators (OCXOs) having different turn-over-temperatures, a selector logic circuit coupled to outputs of the OCXOs, a temperature sensor, and a controller coupled to an output of the temperature sensor. The selector logic circuit outputs one of the outputs of the OCXOs based on a control signal from the controller. The controller also generates control signals for the OCXOs. In some implementations, the reference frequency signal generator includes a phase-locked loop or a fractional output divider coupled to the output of the selector logic circuit and configured to receive a calibration signal from the controller.

公开(公告)号：US11171636B2

公开(公告)日：2021-11-09

申请号：US16585155

申请日：2019-09-27

Applicant: Texas Instruments Incorporated

Inventor： Tolga Dinc ,  Salvatore Luciano Finocchiaro ,  Gerd Schuppener ,  Siraj Akhtar ,  Swaminathan Sankaran ,  Baher Haroun

IPC: H03K5/02 ,  H03K5/26 ,  G01R25/04 ,  H03H7/01 ,  H03K5/00

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to provide phase imbalance correction. An example system includes a phase detector to obtain a first signal and generate a first output, a comparator coupled to the phase detector, the comparator to generate a second output based on the first output, and an amplifier coupled to the comparator, the amplifier to adjust a first phase response of the first signal based on the second output.

公开(公告)号：US20210203331A1

公开(公告)日：2021-07-01

申请号：US16731800

申请日：2019-12-31

Applicant: Texas Instruments Incorporated

Inventor： Salvatore Luciano Finocchiaro ,  Timothy Schmidl ,  Tolga Dinc ,  Gerd Schuppener ,  Siraj Akhtar ,  Swaminathan Sankaran ,  Baher Haroun

IPC: H03L7/099 ,  H03L7/08 ,  H03L7/093 ,  H04B1/40 ,  H04L7/033 ,  H04L27/12 ,  H04L27/14

Abstract: In described examples, a method of operating a transceiver with a transmitter and a receiver includes generating a frequency reference. In the transmitter: A phase locked loop (PLL) generates a first voltage controlled oscillator (VCO) control voltage responsive to the frequency reference. A VCO in the transmitter generates a transmitter VCO signal responsive to the first VCO control voltage, and the PLL is locked to the transmitter VCO signal. In the receiver: A signal is received. A receiver VCO generates a receiver VCO signal responsive to the first or a second VCO control voltage. The receiver VCO signal is multiplied by the received signal to generate an I component, and by the received signal phase shifted by 90° to generate a Q component. The second VCO control signal is generated responsive to the I component and the Q component.

公开(公告)号：US10979277B1

公开(公告)日：2021-04-13

申请号：US16731823

申请日：2019-12-31

Applicant: Texas Instruments Incorporated

Inventor： Timothy Mark Schmidl ,  Swaminathan Sankaran ,  Gerd Schuppener ,  Salvatore Luciano Finocchiaro ,  Siraj Akhtar ,  Tolga Dinc ,  Anand Ganesh Dabak ,  Baher Haroun

IPC: H04L27/38 ,  H04L25/03 ,  H04B7/005 ,  H03L7/191 ,  H03B5/32 ,  H03L7/087

Abstract: In described examples, a method of operating a transmitter includes generating a frequency reference signal having a reference frequency and outputting the frequency reference to a phase locked loop (PLL) that includes a voltage controlled oscillator (VCO). The VCO output is locked to the frequency reference signal to form a carrier signal. The transmitter receives an I input signal, a Q input signal, and a direct current (DC) leaky carrier signal. Either the I input signal or the Q input signal is added to the leaky carrier signal. The carrier signal is modulated with the resulting two signals using an I-Q mixer to generate a modulated signal that includes an unmodulated carrier signal component. The modulated signal is then transmitted.

公开(公告)号：US10763833B2

公开(公告)日：2020-09-01

申请号：US16235291

申请日：2018-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ernst Gerog Muellner ,  Tobias Fritz ,  Bradley Kramer ,  Swaminathan Sankaran ,  Baher Haroun ,  Ralf Brederlow

IPC: H03K3/03 ,  H03K3/014

Abstract: In described examples, a ring oscillator includes a series of N stages in a first ring. Each stage includes a respective output terminal coupled to a respective input terminal of a next one of the stages in the first ring. N is a positive odd-numbered integer of at least three. A series of N level shifters in a second ring are respectively connected to the N stages. Each level shifter receives a respective clock output from a respective output terminal of a stage to which it is connected and generates a respective boosted clock output in response thereto. The boosted clock output is coupled to control an impedance state of a next one of the level shifters in the second ring.

公开(公告)号：US10666204B2

公开(公告)日：2020-05-26

申请号：US16173830

申请日：2018-10-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aritra Banerjee ,  Nathan R. Schemm ,  Rahmi Hezar ,  Lei Ding ,  Baher Haroun

IPC: H03F3/191 ,  H03F1/42 ,  H03F1/02 ,  H03F3/19 ,  H03F3/21 ,  B81B7/02 ,  H03F1/22 ,  H03F3/195 ,  H03F3/24 ,  H03F1/56 ,  H03F3/193 ,  H01L23/66 ,  H01G5/16 ,  H01G5/38 ,  H01G5/40

Abstract: A circuit includes an amplifier to amplify an input signal and generate an output signal. The circuit also includes a tuning network to tune frequency response of the amplifier. The tuning network includes at least one tunable capacitor, which includes at least one micro-electro mechanical system (MEMS) capacitor. The amplifier could include a first die, the at least one MEMS capacitor could include a second die, and the first die and the second die could be integrated in a single package. The at least one MEMS capacitor could include a MEMS superstructure over a control structure, which is to control the MEMS superstructure and tune the capacitance of the at least one MEMS capacitor.

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.

公开(公告)号：US20190123416A1

公开(公告)日：2019-04-25

申请号：US16231463

申请日：2018-12-22

Applicant: Texas Instruments Incorporated

Inventor： Eunyoung Seok ,  Srinath Ramaswamy ,  Brian B. Ginsburg ,  Vijay B. Rentala ,  Baher Haroun

IPC: H01P11/00 ,  H05K3/46 ,  H05K3/40 ,  H05K3/20 ,  H01Q9/04 ,  H01P5/08

Abstract: An apparatus is provided. In the apparatus, there is an antenna package and an integrated circuit (IC). A circuit trace assembly is secured to the IC. A coupler (with an antenna assembly and a high impedance surface (HIS)) is secured to the circuit trace assembly. An antenna assembly has a window region, a conductive region that substantially surrounds the window region, a circular patch antenna that is in communication with the IC, and an elliptical patch antenna that is located within the window region, that is extends over at least a portion of the circular patch antenna, and that is in communication with the circular patch antenna. The HIS substantially surrounds the antenna assembly.

公开(公告)号：US20190109561A1

公开(公告)日：2019-04-11

申请号：US15726291

申请日：2017-10-05

Applicant: Texas Instruments Incorporated

Inventor： Bichoy Bahr ,  Baher Haroun ,  Ali Kiaei

IPC: H03B5/04 ,  H03H9/02 ,  G01C19/56 ,  H03B5/30 ,  H03H9/24 ,  G01K7/32

Abstract: An oscillator is provided with an oscillator circuit having tank circuit terminals for coupling to a tank circuit. A microelectromechanical system (MEMS) resonator serves as a tank circuit. The MEMS resonator is coupled to the oscillator circuit using a transformer with a primary coil coupled to the oscillator tank circuit terminals and a secondary coil coupled to the MEMS resonator terminals, wherein the transformer has a turns ratio of N:1 and N is greater than 1.

公开(公告)号：US20190068135A1

公开(公告)日：2019-02-28

申请号：US16173830

申请日：2018-10-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aritra Banerjee ,  Nathan R. Schemm ,  Rahmi Hezar ,  Lei Ding ,  Baher Haroun

IPC: H03F1/42 ,  H03F1/56 ,  B81B7/02 ,  H03F3/21 ,  H03F3/19 ,  H03F1/02 ,  H01L23/66

CPC classification number: H03F1/42 ,  B81B7/02 ,  B81B2207/99 ,  H01G5/16 ,  H01G5/38 ,  H01G5/40 ,  H01L23/66 ,  H01L2223/6655 ,  H03F1/0205 ,  H03F1/0294 ,  H03F1/223 ,  H03F1/565 ,  H03F3/19 ,  H03F3/193 ,  H03F3/195 ,  H03F3/21 ,  H03F3/211 ,  H03F3/245 ,  H03F2200/111 ,  H03F2200/378 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2200/546 ,  H03F2203/21157

Abstract: A circuit includes an amplifier to amplify an input signal and generate an output signal. The circuit also includes a tuning network to tune frequency response of the amplifier. The tuning network includes at least one tunable capacitor, which includes at least one micro-electro mechanical system (MEMS) capacitor. The amplifier could include a first die, the at least one MEMS capacitor could include a second die, and the first die and the second die could be integrated in a single package. The at least one MEMS capacitor could include a MEMS superstructure over a control structure, which is to control the MEMS superstructure and tune the capacitance of the at least one MEMS capacitor.