# US 11,444,572 B2 · Integrated circuit including resonant circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,572 B2 - Document ID: US11444572B2 - Status: Granted - Kind: B2 - Application number: 17/336,967 - Filed: 2021-06-02 - Published: 2021-09-23 - Granted: 2022-09-13 - Earliest claimed: 2018-12-26 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jichao Huang; Qing Min; Lei Lu - Web page: https://patentgrep.com/patent/US11444572B2 ## CPC - H03B 5/12: active element in amplifier being semiconductor device (H03B5/14 takes precedence) - H03B 5/1212: {the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair} - H03B 5/1228: {the amplifier comprising one or more field effect transistors} - H03B 2200/0026: relating to the pins of integrated circuits - H03B: GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS (generators adapted for electrophonic musical instruments G10H; masers or lasers H01S; generation of oscillations in plasma H05H) ## Abstract The present disclosure relates to integrated circuits. One example integrated circuit includes a first resonant circuit, a second resonant circuit, and at least one connection circuit. The first resonant circuit includes a first inductor, and the second resonant circuit includes a second inductor. The first inductor includes a first port and a second port, and the second inductor includes a third port and a fourth port. The at least one connection circuit is connected between at least one of the first port and the second port and at least one of the third port and the fourth port. Each connection circuit of the at least one connection circuit provides an electrical connection between two ports, where each of the two ports is connected to the connection circuit. ## Claims ### Claim 1 An integrated circuit, wherein the integrated circuit comprises a first resonant circuit, a second resonant circuit, and at least one connection circuit, the first resonant circuit comprises a first inductor, and the second resonant circuit comprises a second inductor; wherein the first inductor comprises a first port and a second port, the second inductor comprises a third port and a fourth port, the at least one connection circuit is connected between at least one of the first port and the second port and at least one of the third port and the fourth port, and each connection circuit of the at least one connection circuit provides an electrical connection between two ports, wherein each of the two ports is connected to the connection circuit; wherein the first inductor and the second inductor at least partially overlap; and wherein the connection circuit comprises a resistor, a resistance value of the resistor is less than a first preset threshold, and the first resonant circuit and the second resonant circuit do not meet an oscillation startup condition at a reverse-phase oscillation frequency or an in-phase oscillation frequency. ### Claim 2 (depends on 1) The integrated circuit according to claim 1, wherein the first port, the second port, the third port, and the fourth port are input ports or output ports of signals. ### Claim 3 (depends on 1) The integrated circuit according to claim 1, wherein the first port and the second port are differential ports, and wherein the third port and the fourth port are differential ports. ### Claim 4 (depends on 1) The integrated circuit according to claim 1, wherein the connection circuit is a metal connection wire. ### Claim 5 (depends on 1) The integrated circuit according to claim 1, wherein the connection circuit further comprises at least one of a capacitor or an inductor. ### Claim 6 (depends on 5) The integrated circuit according to claim 5, wherein the capacitor comprises an on-chip capacitor, a diode, a metal oxide semiconductor (MOS) transistor, or a varactor. ### Claim 7 (depends on 5) The integrated circuit of claim 5, wherein the connection circuit comprises the resistor, the inductor, a first diode, and a second diode. ### Claim 8 (depends on 1) The integrated circuit according to claim 1, wherein the first resonant circuit is a first digitally controlled oscillator (DCO) core, and wherein the second resonant circuit is a second DCO core. ### Claim 9 (depends on 1) The integrated circuit according to claim 1, wherein the first resonant circuit is a first voltage controlled oscillator (VCO) core, and wherein the second resonant circuit is a second VCO core. ### Claim 10 (depends on 9) The integrated circuit according to claim 9, wherein the first VCO core further comprises a first negative resistor and a first parallel resistor, the second VCO core further comprises a second negative resistor and a second parallel resistor, the first negative resistor and the first parallel resistor are connected in parallel to two ports of the first inductor, and the second negative resistor and the second parallel resistor are connected in parallel to two ports of the second inductor. ### Claim 11 (depends on 1) The integrated circuit according to claim 1, wherein: when flow directions of signals in the first inductor and the second inductor enable positive mutual inductance between the first inductor and the second inductor, at a same moment, both the first port and the third port are input ports of the signals, or both the first port and the third port are output ports of the signals; or when flow directions of signals in the first inductor and the second inductor enable negative mutual inductance between the first inductor and the second inductor, at a same moment, both the first port and the fourth port are input ports of the signals, or both the first port and the fourth port are output ports of the signals. ### Claim 12 (depends on 11) The integrated circuit according to claim 11, wherein a connection circuit is connected between the first port and the third port. ### Claim 13 (depends on 11) The integrated circuit according to claim 11, wherein a connection circuit is connected between the second port and the fourth port. ### Claim 14 (depends on 1) The integrated circuit according to claim 1, wherein the at least one connection circuit comprises a first connection circuit and a second connection circuit, and the first connection circuit is different from the second connection circuit; and wherein the first connection circuit is connected between the first port and the third port, and the second connection circuit is connected between the second port and the fourth port. ### Claim 15 (depends on 11) The integrated circuit according to claim 11, wherein: a connection circuit is connected between the first port and the fourth port; or a connection circuit is connected between the second port and the third port. ### Claim 16 (depends on 11) The integrated circuit according to claim 11, wherein a connection circuit is connected between the first port and the fourth port, and a connection circuit is connected between the second port and the third port. ### Claim 17 (depends on 11) The integrated circuit according to claim 11, wherein the at least one connection circuit comprises a first connection circuit and a second connection circuit, and the first connection circuit is different from the second connection circuit; and wherein the first connection circuit is connected between the first port and the fourth port, and the second connection circuit is connected between the second port and the third port. ### Claim 18 (depends on 11) The integrated circuit according to claim 11, wherein the signals comprise at least one of a current signal or a voltage signal. ### Claim 19 (depends on 1) The integrated circuit according to claim 1, wherein both the two ports connected to the connection circuit are input ports of signals or output ports of the signals.