-
1.发明公开公开(公告)号：US20240267005A1
公开(公告)日：2024-08-08
申请号：US18639872
申请日：2024-04-18
Applicant: Silicon Laboratories Inc.
Inventor： Rangakrishnan Srinivasan , Mustafa H. Koroglu , Zhongda Wang , Francesco Barale , Abdulkerim L. Coban , John M. Khoury , Sriharsha Vasadi , Michael S. Johnson , Vitor Pereira
CPC classification number: H03F1/26 , H03B5/04 , H03F1/30 , H03F3/245 , H03K5/00 , H03F2200/375 , H03K2005/00019
Abstract: A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to amplify the delayed oscillating signal for transmission sufficient to produce interference, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
-
公开(公告)号：US12028024B2
公开(公告)日：2024-07-02
申请号：US16705868
申请日：2019-12-06
Applicant: Silicon Laboratories Inc.
Inventor： Rangakrishnan Srinivasan , Mustafa H. Koroglu , Zhongda Wang , Francesco Barale , Abdulkerim L Coban , John M. Khoury , Sriharsha Vasadi , Michael S. Johnson , Vitor Pereira
CPC classification number: H03F1/26 , H03B5/04 , H03F1/30 , H03F3/245 , H03K5/00 , H03F2200/375 , H03K2005/00019
Abstract: A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to use the delayed oscillating signal for transmitting a signal, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
-
公开(公告)号：US20230318609A1
公开(公告)日：2023-10-05
申请号：US17709642
申请日：2022-03-31
Applicant: Silicon Laboratories Inc.
Inventor： Rangakrishnan Srinivasan , Zhongda Wang , Francesco Barale , Wenhuan Yu , Mustafa H. Koroglu , Yan Zhou , Terry L. Dickey
CPC classification number: H03L7/1075 , H04B1/40 , H03L7/099
Abstract: A phase-locked loop (PLL) that provides a local oscillator signal for a radio. An oscillator of the PLL supplies an oscillator output signal. Control logic receives a request to change the oscillator output signal to a new frequency and responds to the request by setting a first capacitor circuit of the oscillator to a first capacitance that corresponds to a predetermined frequency of the oscillator output signal. The control logic also responds to the request by setting one or more other capacitor circuits of the oscillator according to temperature and according to a frequency difference between the predetermined frequency and the new frequency. After responding to the request by setting the first capacitor circuit and the one or more other capacitor circuits, the PLL locks to the new frequency using a signal from the PLL loop filter to adjust another capacitor circuit in the oscillator.
-
公开(公告)号：US11973509B2
公开(公告)日：2024-04-30
申请号：US17709642
申请日：2022-03-31
Applicant: Silicon Laboratories Inc.
Inventor： Rangakrishnan Srinivasan , Zhongda Wang , Francesco Barale , Wenhuan Yu , Mustafa H. Koroglu , Yan Zhou , Terry L. Dickey
CPC classification number: H03L7/1075 , H03L7/099 , H04B1/40
Abstract: A phase-locked loop (PLL) that provides a local oscillator signal for a radio. An oscillator of the PLL supplies an oscillator output signal. Control logic receives a request to change the oscillator output signal to a new frequency and responds to the request by setting a first capacitor circuit of the oscillator to a first capacitance that corresponds to a predetermined frequency of the oscillator output signal. The control logic also responds to the request by setting one or more other capacitor circuits of the oscillator according to temperature and according to a frequency difference between the predetermined frequency and the new frequency. After responding to the request by setting the first capacitor circuit and the one or more other capacitor circuits, the PLL locks to the new frequency using a signal from the PLL loop filter to adjust another capacitor circuit in the oscillator.
-
5.发明申请公开(公告)号：US20220416829A1
公开(公告)日：2022-12-29
申请号：US17362148
申请日：2021-06-29
Applicant: Silicon Laboratories Inc.
Inventor： Mohamed M. Elkholy , Francesco Barale , Mustafa H. Koroglu
Abstract: A wireless transceiver circuit with an impedance matching network within an integrated circuit is disclosed. In some embodiments, the impedance matching network utilizes an inductor, having two portions, disposed on two different metal layers of the integrated circuit. The first end of the first portion of the inductor is in communication with an antenna. The second end of the second portion is in communication with a low noise amplifier for receiving signals and a power amplifier for transmitting RF signals. The second end of the first portion is connected to the first end of the second portion using a via. In another embodiment, the two portions are disposed on the same metal layer, wherein one portion is disposed within the other with a gap separating the two portions. These configurations require less space than using two separate inductors and also have a low coupling coefficient.
-
Patent Agency Ranking
6.发明授权公开(公告)号：US11552666B1
公开(公告)日：2023-01-10
申请号：US17362148
申请日：2021-06-29
Applicant: Silicon Laboratories Inc.
Inventor： Mohamed M. Elkholy , Francesco Barale , Mustafa H. Koroglu
Abstract: A wireless transceiver circuit with an impedance matching network within an integrated circuit is disclosed. In some embodiments, the impedance matching network utilizes an inductor, having two portions, disposed on two different metal layers of the integrated circuit. The first end of the first portion of the inductor is in communication with an antenna. The second end of the second portion is in communication with a low noise amplifier for receiving signals and a power amplifier for transmitting RF signals. The second end of the first portion is connected to the first end of the second portion using a via. In another embodiment, the two portions are disposed on the same metal layer, wherein one portion is disposed within the other with a gap separating the two portions. These configurations require less space than using two separate inductors and also have a low coupling coefficient.
-
公开(公告)号：US11349448B2
公开(公告)日：2022-05-31
申请号：US16586153
申请日：2019-09-27
Applicant: Silicon Laboratories Inc.
Inventor： Ruifeng Sun , Francesco Barale , Vinod Jayakumar , Sherry Xiaohong Wu , Mustafa H. Koroglu , Essam S. Atalla
Abstract: Systems and methods are disclosed for on-chip harmonic filtering for radio frequency (RF) communications. For disclosed embodiments, a filter circuit is coupled between a first internal node and a connection pad for an integrated circuit. The filter circuit includes a first inductance, a variable capacitance, and a second inductance. The capacitance amount for the variable capacitance is controlled to tune filtering for the filter circuit to a harmonic of a frequency for a transmit output signal. A power amplifier outputs the transmit output signal to the connection pad without passing through the filter circuit. The filter circuit filters the harmonic of the frequency for the transmit output signal, shunting harmonic current to ground. For one embodiment, the filtered harmonic is a third harmonic of the transmit frequency. For one embodiment, the transmit output signal has an output power greater than or equal to 15 dBm.
-
公开(公告)号：US20210175855A1
公开(公告)日：2021-06-10
申请号：US16705868
申请日：2019-12-06
Applicant: Silicon Laboratories Inc.
Inventor： Rangakrishnan Srinivasan , Mustafa H. Koroglu , Zhongda Wang , Francesco Barale , Abdulkerim L. Coban , John M. Khoury , Sriharsha Vasadi , Michael S. Johnson , Vitor Pereira
Abstract: A transmitter including a frequency synthesizer with a voltage-controlled oscillator that provides an oscillating signal, a programmable delay circuit that delays the oscillating signal to provide a delayed oscillating signal, a power amplifier that is configured to use the delayed oscillating signal for transmitting a signal, and a delay controller that programs the delay circuit with a delay time that reduces interference caused by coupling from the power amplifier to the voltage-controlled oscillator. The delay circuit may be programmed to reduce control voltage change of the voltage-controlled oscillator as a function of delay change, and/or to reduce phase noise degradation at an output of the transmitter as a function of delay change. The delay may be adjusted based on detected operating temperature. A calibration value may be determined at a calibration frequency, in which a frequency offset may be determined based on a selected channel frequency.
-
公开(公告)号：US11705861B1
公开(公告)日：2023-07-18
申请号：US17853070
申请日：2022-06-29
Applicant: Silicon Laboratories Inc.
Inventor： Mohamed M. Elkholy , Francesco Barale , Tiago Pinto Guia Marques , Steffen Skaug , Håkon Børli
CPC classification number: H03B5/06 , H03B5/36 , H03B5/364 , H03L7/099 , H03B2200/0012
Abstract: A first three state driver injects a first clock signal into a crystal through an input node during a startup phase of a crystal oscillator and a second three state driver injects a second signal into the crystal through an output node during the startup phase. The first and second signals are anti-phase signals. The crystal oscillator circuit includes a first amplifier that is used during starting up and steady-state operation and includes a second amplifier. The injection through the input and output nodes is disabled after a fixed time. After injection ends, the second amplifier is turned on if voltage on the output node has reached a desired voltage and left off otherwise. If the second amplifier is turned on, the second amplifier is turned off when the voltage on the output node reaches the desired voltage.
-
公开(公告)号：US11444627B1
公开(公告)日：2022-09-13
申请号：US17549314
申请日：2021-12-13
Applicant: Silicon Laboratories Inc.
Inventor： Rangakrishnan Srinivasan , Michael Wu , Francesco Barale , John Khoury , Aslamali A. Rafi
Abstract: A system and method for accurately determining a distance between two network devices using a Channel Sounding application is disclosed. The network devices each guarantee a fixed phase relationship between the transmit circuit and the receive circuit. In one embodiment, this is achieved by incorporating the divider within the phase locked loop. The divider may have a reset, such that it can be initialized to a predetermined state. Further, by utilizing a divider disposed within the phase locked loop with a reset, the quadrature signal generator is guaranteed to output clocks for the transmit circuit and the receive circuit that have a constant phase relationship.
-
-
-
-
-
-
-
-
-
Search Results
16
records
(took 0.046 seconds)
