公开(公告)号：US11476838B1

公开(公告)日：2022-10-18

申请号：US17362353

申请日：2021-06-29

Applicant: NXP B.V.

Inventor： Sander Derksen ,  Jos Verlinden ,  Ids Christiaan Keekstra ,  Rene Verlinden

IPC: H03K3/0231 ,  H03K3/011

Abstract: Various embodiments relate to a free running oscillator, including: a voltage controlled oscillator circuit including an input configured to receive an input voltage and an output configured to provide an oscillation signal, wherein the input voltage controls a frequency of the oscillation signal; a frequency to voltage circuit including an input configured to receive the oscillation signal and an output configured to produce a voltage dependent on a frequency of the oscillation signal; a comparison circuit including an input and an output comprising: a first amplifier including a first input, a second input, and an output, wherein the output is based upon a difference in voltage between the first input and the second input, wherein the first input received one of a reference voltage and the output of frequency to voltage circuit; a second amplifier including a first input, a second input, and an output, wherein the output is based upon a difference in voltage between the first input and the second input, first input is connected to the comparator output, the second inputs is connected to the second amplifier output; a sampling capacitor connected between the second input of the first amplifier and a ground; and an integration capacitor connected between the comparator output and the ground.

公开(公告)号：US11791832B2

公开(公告)日：2023-10-17

申请号：US17577501

申请日：2022-01-18

Applicant: NXP B.V.

Inventor： Erik Olieman ,  Rene Verlinden ,  Helmut Kranabenter

IPC: H03M1/10

CPC classification number: H03M1/1014

Abstract: A calibration system comprises an actuator circuit comprising a first delay circuit that receives a plurality of data pulses and a second delay circuit that receives the pulses, wherein one of the first and second delay circuits delays the data pulses independently of the other of the first and second delay circuits; a data switch that receives an output of the actuator circuit including delay data signals of the data pulses from the first and second delay circuits and switches and outputs a plurality of local oscillator (LO) signals for output as a controlled LO signal according to control signals of the delay data signals and applied to the data switch. At least one calibration switch receives the output of the actuator circuit and the plurality of LO+ and LO− signals, and outputs a second controlled LO signal output to a sense circuit.

公开(公告)号：US20230231566A1

公开(公告)日：2023-07-20

申请号：US17577501

申请日：2022-01-18

Applicant: NXP B.V.

Inventor： Erik Olieman ,  Rene Verlinden ,  Helmut Kranabenter

IPC: H03M1/10

CPC classification number: H03M1/1014

Abstract: A calibration system comprises an actuator circuit comprising a first delay circuit that receives a plurality of data pulses and a second delay circuit that receives the pulses, wherein one of the first and second delay circuits delays the data pulses independently of the other of the first and second delay circuits; a data switch that receives an output of the actuator circuit including delay data signals of the data pulses from the first and second delay circuits and switches and outputs a plurality of local oscillator (LO) signals for output as a controlled LO signal according to control signals of the delay data signals and applied to the data switch. At least one calibration switch receives the output of the actuator circuit and the plurality of LO+ and LO− signals, and outputs a second controlled LO signal output to a sense circuit.