# US 2014/0152399 A1 · Digitally controlled phase shifter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152399 A1 - Document ID: US20140152399A1 - Status: Published application - Kind: A1 - Application number: 13/691,308 - Filed: 2012-11-30 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Danial Ehyaie; Muhammad Adnan - Web page: https://patentgrep.com/patent/US20140152399A1 ## CPC - H03H 7/20: Two-port phase shifters providing an adjustable phase shift - H03H 7/185: {comprising distributed impedance elements together with lumped impedance elements} - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) ## Abstract A digitally controlled phase shifter is disclosed. In an exemplary embodiment, an apparatus includes a first component connected between a first terminal and a node, a second component connected between a second terminal and the node, an impedance selectively connected between the first and second terminals by a first switch, and a second switch to connected between the node and a ground. The apparatus is configured to provide a first amount of phase shift when the first and second switches are in an open position, and a second amount of phase shift when the first and second switches are in a closed position. ## Claims ### Claim 1 An apparatus comprising: a first component connected between a first terminal and a node; a second component connected between a second terminal and the node; a third impedance selectively connected between the first and second terminals by a first switch; and a second switch connected between the node and a ground, the first and second switches configured to enable selected amounts of phase shifts to signals flowing between the first and second terminals. ### Claim 2 (depends on 1) The apparatus of claim 1, the first and second components comprising first and second transmission lines, respectively. ### Claim 3 (depends on 2) The apparatus of claim 2, the third impedance comprising a capacitor. ### Claim 4 (depends on 3) The apparatus of claim 3, the first and second transmission lines are configured to provide a first amount of phase shift between the first and second terminals when the first and second switches are in an open position. ### Claim 5 (depends on 4) The apparatus of claim 4, the first transmission line, the second transmission line, and the third impedance are configured to provide a second amount of phase shift between the first and second terminals when the first and second switches are in a closed position. ### Claim 6 (depends on 5) The apparatus of claim 5, the first amount of phase shift is configured to be different from the second amount of phase shift by a selected value. ### Claim 7 (depends on 6) The apparatus of claim 6, the selected value chosen from a set of values comprising 180, 90, and 45 and degrees. ### Claim 8 (depends on 1) The apparatus of claim 1, a first group delay measured when the first and second switches are open is substantially equal to a second group delay measured when the first and second switches are closed. ### Claim 9 (depends on 2) The apparatus of claim 2, further comprising a fourth impedance connected between the node and the ground. ### Claim 10 (depends on 9) The apparatus of claim 9, the fourth impedance comprising a second capacitor. ### Claim 11 (depends on 9) The apparatus of claim 9, the first transmission line, the second transmission line, and the fourth impedance are configured to provide a first amount of phase shift between the first and second terminals when the first and second switches are in an open position. ### Claim 12 (depends on 9) The apparatus of claim 9, the first transmission line, the second transmission line, and the third impedance are configured to provide a second amount of phase shift between the first and second terminals when the first and second switches are in a closed position. ### Claim 13 (depends on 9) The apparatus of claim 9, a first group delay measured when the first and second switches are open is substantially equal to a second group delay measured when the first and second switches are closed. ### Claim 14 (depends on 1) The apparatus of claim 1, the first and second components comprising first and second capacitors, respectively, the third impedance comprising a first inductor and further including a fourth impedance connected between the node and the ground, the fourth impedance comprising a second inductor. ### Claim 15 (depends on 14) The apparatus of claim 14, the first and second capacitors and the fourth impedance are configured to provide a first amount of phase shift between the first and second terminals when the first and second switches are in an open position. ### Claim 16 (depends on 14) The apparatus of claim 14, the first and second capacitors and third impedance are configured to provide a second amount of phase shift between the first and second terminals when the first and second switches are in a closed position. ### Claim 17 (depends on 16) The apparatus of claim 16, the first amount of phase shift is configured to be different from the second amount of phase shift by a selected value. ### Claim 18 (depends on 14) The apparatus of claim 14, a first group delay measured when the first and second switches are open is substantially equal to a second group delay measured when the first and second switches are closed. ### Claim 19 An apparatus comprising: means for providing a component connected between a first terminal and a node; means for providing a second component connected between a second terminal and the node; means for providing a third impedance connected between the first terminal and the second terminal; means for selectably disconnecting the third impedance from the second terminal; and means for selectably connecting the node to a ground, the means for selectably disconnecting and connecting configured to enable selected amounts of phase shifts to signals flowing between the first and second terminals. ### Claim 20 (depends on 19) The apparatus of claim 19, a first amount of phase shift is provided between the first and second terminals when the third impedance is disconnected from the second terminal and the node is disconnected from the ground, and a second amount of phase shift is provided between the first and second terminals when the third impedance is connected to the second terminal and the node is connected to the ground.