公开(公告)号：EP4352875A1

公开(公告)日：2024-04-17

申请号：EP22809999.0

申请日：2022-05-24

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal ,  NICHOLS, Richard

IPC: H03H17/02 ,  H03H9/46 ,  H03H9/64 ,  H03M1/00 ,  H04L25/03

CPC classification number: H03M3/402 ,  H03M3/344 ,  H03M3/454 ,  H03M3/37 ,  H03M3/372 ,  H03M3/40 ,  H03H17/0289 ,  H03H17/0291 ,  H03H9/6423 ,  H03H11/1221

公开(公告)号：EP3926828A1

公开(公告)日：2021-12-22

申请号：EP21179567.9

申请日：2021-06-15

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal

IPC: H03H11/12

Abstract: A method of stabilizing a variable filter for an analog electromagnetic signal against circuit oscillation includes the steps of: providing a signal loop comprising a signal input, a signal output, and a plurality of variable circuit elements connected in the signal loop, the plurality of variable circuit elements comprising an adjustable resonator and an adjustable gain block, the signal loop having a variable frequency response that is characterized by a central frequency, a frequency passband, a response Q, and an operating point and a resonator response curve that are plottable in a Cartesian s-plane having an origin, a real axis, and an imaginary axis; and maintaining stability of the variable filter within an operating range by controlling the adjustable resonator and the adjustable gain block such that, in the Cartesian s-plane, the resonator response curve satisfies an orthogonality stability condition.

公开(公告)号：EP4243284A3

公开(公告)日：2023-10-11

申请号：EP23182890.6

申请日：2016-11-23

Applicant: Anlotek Limited

Inventor： NICHOLS, Richard ,  NIELSEN, Jorgen Staal

IPC: H03H11/12

Abstract: A variable filter has a signal loop defined between a signal input and a signal output. A plurality of circuit elements connected in the signal loop, the plurality of circuit elements comprising a frequency tunable resonator, and an adjustable scaling block that applies a gain factor that is adjustable in a range that comprises a positive gain and a negative gain. A controller is connected to 1) tune the frequency tunable resonator; and to 2) adjust the gain factor of the adjustable scaling block between a negative gain factor to a positive gain factor providing for variable Q independent of frequency.

公开(公告)号：EP4070171A1

公开(公告)日：2022-10-12

申请号：EP20824998.7

申请日：2020-12-04

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal

IPC: G06F1/03

公开(公告)号：EP3890189A1

公开(公告)日：2021-10-06

申请号：EP21165631.9

申请日：2021-03-29

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal

IPC: H03H11/12 ,  H03H7/01

Abstract: A variable filter for an RF circuit has a signal loop (16) comprising a signal input port (18) and a signal output port (20), and a plurality of circuit elements connected within the signal loop. The plurality of circuit elements comprise a multi-pole resonator (30) comprising a plurality of frequency tunable resonators and an adjustable scaling block (22) that applies a gain factor. Adjacent frequency tunable resonators within the multi-pole resonator are reciprocally coupled. A controller (24) is connected to tune the multi-pole resonator and to adjust the gain factor of the adjustable scaling block such that the signal loop generates a desired bandpass response.

公开(公告)号：EP3381126A1

公开(公告)日：2018-10-03

申请号：EP16804863.5

申请日：2016-11-23

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal ,  NICHOLS, Richard

IPC: H03H11/12

CPC classification number: H03H11/1208 ,  H03G3/3042 ,  H03H11/1291 ,  H03H2210/012 ,  H03H2210/015

Abstract: A variable filter has a signal loop defined between a signal input and a signal output. A plurality of circuit elements connected in the signal loop, the plurality of circuit elements comprising a frequency tunable resonator, and an adjustable scaling block that applies a gain factor that is adjustable in a range that comprises a positive gain and a negative gain. A controller is connected to 1) tune the frequency tunable resonator; and to 2) adjust the gain factor of the adjustable scaling block between a negative gain factor to a positive gain factor providing for variable Q independent of frequency.

公开(公告)号：EP4243284A2

公开(公告)日：2023-09-13

申请号：EP23182890.6

申请日：2016-11-23

Applicant: Anlotek Limited

Inventor： NICHOLS, Richard ,  NIELSEN, Jorgen Staal

IPC: H03H11/12

Abstract: A variable filter has a signal loop defined between a signal input and a signal output. A plurality of circuit elements connected in the signal loop, the plurality of circuit elements comprising a frequency tunable resonator, and an adjustable scaling block that applies a gain factor that is adjustable in a range that comprises a positive gain and a negative gain. A controller is connected to 1) tune the frequency tunable resonator; and to 2) adjust the gain factor of the adjustable scaling block between a negative gain factor to a positive gain factor providing for variable Q independent of frequency.

公开(公告)号：EP4089920A1

公开(公告)日：2022-11-16

申请号：EP22172974.2

申请日：2022-05-12

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal

IPC: H03J3/20 ,  G06F1/02 ,  G06F1/03 ,  H03H11/04

Abstract: An RF signal is tuned by: producing a first signal at a first frequency using a digital sequence generator; filtering the first signal using a frequency-tunable tracking filter that is tuned to the first frequency, the tracking filter comprising one or more variable resonators; tuning the tracking filter from the first frequency to a second frequency over a transition period; and tuning the first signal to the second frequency by causing the digital sequence generator to transition between two or more states during the transition period. The two or more states are selected such that, immediately after the transition period, the analog signal substantially matches a desired steady state at the second frequency.

公开(公告)号：EP4084333A1

公开(公告)日：2022-11-02

申请号：EP22171047.8

申请日：2022-04-29

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal

IPC: H03H11/12 ,  H03B5/08

Abstract: An active feedback RF resonator has a signal loop having a signal input (26) and a signal output (28). The signal loop has a variable gain stage (16) and at least one variable resonator (20), each variable resonator comprising an inductance element and a variable capacitance element comprising a number of switched fixed value capacitors and a variable capacitor. A phase noise of the active feedback RF signal has a maximum value for an operating frequency of the variable resonator that is based on an operating range of the variable capacitor.

公开(公告)号：EP4054076A1

公开(公告)日：2022-09-07

申请号：EP22159113.4

申请日：2022-02-28

Applicant: Anlotek Limited

Inventor： NIELSEN, Jorgen Staal ,  NICHOLS, Richard

IPC: H03H11/12 ,  H03H17/02

Abstract: An RF signal is processed by coupling an input signal into a signal loop, the signal loop comprising a resonator and a processing block, and filtering the input signal in the signal loop to produce an output signal by obtaining a plurality of resonator outputs from the resonator and processing the plurality of resonator outputs to generate feedback signals. The feedback signals are connected to a point upstream of the resonator. At least one of the plurality of resonator outputs is processed in the processing block. The signal loop is definable by a transfer function having poles, and the plurality of resonator outputs are processed such that the poles of the transfer function are independently controllable.