# US 11,444,593 B2 · Method and apparatus for adapting a variable impedance network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,593 B2 - Document ID: US11444593B2 - Status: Granted - Kind: B2 - Application number: 17/171,739 - Filed: 2021-02-09 - Published: 2021-06-03 - Granted: 2022-09-13 - Earliest claimed: 2010-03-22 - Assignees: NXP USA, Inc. - Applicants: NXP USA, Inc. - Inventors: Keith Manssen; Matthew Russell Greene - Web page: https://patentgrep.com/patent/US11444593B2 ## CPC - H03H 7/38: Impedance-matching networks - H03H 5/12: with at least one voltage- or current-dependent element - H03H 7/004: {Capacitive coupling circuits not otherwise provided for} - H03H 7/40: Automatic matching of load impedance to source impedance - H03K 17/56: by the use, as active elements, of semiconductor devices (using diodes H03K17/74) - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract The present disclosure may include, for example, a tunable capacitor having a decoder for generating a plurality of control signals, and an array of tunable switched capacitors comprising a plurality of fixed capacitors coupled to a plurality of switches. The plurality of switches can be controlled by the plurality of control signals to manage a tunable range of reactance of the array of tunable switched capacitors. Additionally, the array of tunable switched capacitors is adapted to have non-uniform quality (Q) factors. Additional embodiments are disclosed. ## Claims ### Claim 1 A device comprising: a tunable matching network on a single die, the tunable matching network including a plurality of signal switches, wherein the plurality of signal switches are configurable to provide a first matching network and a separate second matching network having respectively a low-frequency signal path and a high-frequency signal path, wherein the single die has a plurality of ports for coupling to an input and an output of the first matching network and to an input and an output of the second matching network; wherein one or both of the low-frequency signal path and the high-frequency signal path comprises a tunable network; and wherein an input switch of the plurality of signal switches is directly coupled to an input port of the plurality of ports and an output switch of the plurality of signal switches is directly coupled to an output port of the plurality of ports. ### Claim 2 (depends on 1) The device of claim 1, wherein at least a portion of the plurality of signal switches are integrated into the die. ### Claim 3 (depends on 1) The device of claim 1, wherein one or both of the low-frequency signal path and the high-frequency signal path comprises a tunable network; wherein a first input port of the plurality of ports and a separate second input port of the plurality of ports are respectively coupled to the input of the first matching network and the input of the second matching network, and wherein the output switch of the plurality of signal switches is configured to connect the output port alternately to the output of the first matching network or the output of the second matching network. ### Claim 4 (depends on 3) The device of claim 3, wherein the first input port and the second input port are connected to a dual-mode antenna. ### Claim 5 (depends on 1) The device of claim 1, wherein the device comprises a radio system, and wherein the tunable matching network is configured to connect to one of a single-input radio or a dual-input radio. ### Claim 6 (depends on 1) The device of claim 1, wherein the device comprises a handset, and wherein the tunable matching network is configured to interface to an antenna of the handset. ### Claim 7 (depends on 1) The device of claim 1, wherein a first output port of the plurality of ports and a separate second output port of the plurality of ports are respectively coupled to the output of the first matching network and the output of the second matching network, and wherein the input switch of the plurality of signal switches is configured to connect the input port alternately to the input of the first matching network or the input of the second matching network. ### Claim 8 (depends on 7) The device of claim 7, wherein the input switch is configured to divert a signal to one of the low-frequency signal path or the high-frequency signal path, in accordance with a frequency of the signal. ### Claim 9 (depends on 1) The device of claim 1, wherein the device is configured to provide a tunable matching network in one of a low-frequency signal band and a high-frequency signal band and a fixed matching network in the other of the low-frequency signal band and the high-frequency signal band. ### Claim 10 A device comprising: a tunable matching network on a single die, the tunable matching network including a plurality of signal switches, wherein the plurality of signal switches are configurable to provide a first tunable matching network and a separate second tunable matching network having respectively a low-frequency signal path and a high-frequency signal path, and to divert a signal to one of the low-frequency signal path or the high-frequency signal path, in accordance with a frequency of the signal; and wherein an input switch of the plurality of signal switches is directly coupled to an input port of the plurality of ports and an output switch of the plurality of signal switches is directly coupled to an output port of the plurality of ports. ### Claim 11 (depends on 10) The device of claim 10, wherein at least a portion of the plurality of signal switches are integrated into the die. ### Claim 12 (depends on 10) The device of claim 10, wherein the single die has a plurality of ports for coupling to an input and an output of the first tunable matching network and to an input and an output of the second tunable matching network. ### Claim 13 (depends on 12) The device of claim 12, wherein a first input port of the plurality of ports and a separate second input port of the plurality of ports are respectively coupled to the input of the first tunable matching network and the input of the second tunable matching network, and wherein the output switch of the plurality of signal switches is configured to connect the output port alternately to the output of the first tunable matching network or the output of the second tunable matching network. ### Claim 14 (depends on 13) The device of claim 13, wherein the first input port and the second input port are connected to a dual-mode antenna. ### Claim 15 (depends on 12) The device of claim 12, wherein a first output port of the plurality of ports and a separate second output port of the plurality of ports are respectively coupled to the output of the first tunable matching network and the output of the second tunable matching network, and wherein the input switch of the plurality of signal switches is configured to connect the input port alternately to the input of the first tunable matching network or the input of the second tunable matching network. ### Claim 16 A device comprising: a tunable matching network on a single die, the tunable matching network including a plurality of signal switches, wherein the plurality of signal switches are configurable to provide in the tunable matching network a first signal path and a separate second signal path, the first signal path and the second signal path respectively comprising a low-frequency signal path and a high-frequency signal path, wherein the single die has a plurality of ports for coupling to an input and an output of the first signal path and to an input and an output of the second signal path; wherein the plurality of signal switches are configured to divert a signal to one of the low-frequency signal path or the high-frequency signal path, in accordance with a frequency of the signal; and wherein an input switch of the plurality of signal switches is directly coupled to an input port of the plurality of ports and an output switch of the plurality of signal switches is directly coupled to an output port of the plurality of ports. ### Claim 17 (depends on 16) The device of claim 16, wherein at least a portion of the plurality of signal switches are integrated into the die. ### Claim 18 (depends on 16) The device of claim 16, wherein a first input port of the plurality of ports and a separate second input port of the plurality of ports are respectively coupled to the input of the first signal path and the input of the second signal path, and wherein the output switch of the plurality of signal switches is configured to connect the output port alternately to the output of the first signal path or the output of the second signal path. ### Claim 19 (depends on 18) The device of claim 18, wherein the first input port and the second input port are connected to a dual-mode antenna. ### Claim 20 (depends on 16) The device of claim 16, wherein a first output port of the plurality of ports and a separate second output port of the plurality of ports are respectively coupled to the output of the first signal path and the output of the second signal path, and wherein the input switch of the plurality of signal switches is configured to connect the input port alternately to the input of the first signal path or the input of the second signal path.