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公开(公告)号：US20220416780A1
公开(公告)日：2022-12-29
申请号：US17356606
申请日：2021-06-24
Inventor： Hamed Sadati , John A. Breslin , Sushanth Hegde , John L. Melanson
IPC: H03K17/30 , H03K17/042 , H03K17/06
Abstract: Pre-conditioning circuitry for pre-conditioning a node of a circuit to support a change in operation of the circuit, wherein the circuit is operative to change a state of the node to effect the change in operation of the circuit, and wherein the pre-conditioning circuitry is configured to apply a voltage, current or charge directly to the node to reduce the magnitude of the change to the state of the node required by the circuit to achieve the change in operation of the circuit.
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公开(公告)号：US10855258B1
公开(公告)日：2020-12-01
申请号：US16594794
申请日：2019-10-07
Inventor： Gary Robertson , Hamed Sadati , Rupesh Khare , Sameer Baveja
Abstract: This application relates to methods and apparatus for voltage control, and in particular to maintain safe voltages for components of audio driving circuits that are operable in a high voltage mode. An audio driving circuit (100) may include a power supply module (106) and may be operable such that, in use, a voltage magnitude at a source terminal of at least a first transistor (306, 309, 603, 605) of the audio driving circuit can exceed its gate-source voltage tolerance. A voltage generator (111P) is configured to output a first intermediate voltage (VSAFEP) to an intermediate voltage path for use as a gate control voltage for at least the first transistor, to maintain its gate-source voltage below tolerance. An intermediate path voltage clamp (114P) is provided for selectively clamping the intermediate voltage path to a voltage level, so as to maintain the magnitude of the gate-source voltage of the first transistor below tolerance. The voltage clamp (114P) is enabled by a reset condition (RST) for the audio driving circuit.
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公开(公告)号：US11936373B2
公开(公告)日：2024-03-19
申请号：US17356606
申请日：2021-06-24
Inventor： Hamed Sadati , John A. Breslin , Sushanth Hegde , John L. Melanson
IPC: H03K17/30 , H03K17/042 , H03K17/06
CPC classification number: H03K17/302 , H03K17/04206 , H03K17/063
Abstract: Pre-conditioning circuitry for pre-conditioning a node of a circuit to support a change in operation of the circuit, wherein the circuit is operative to change a state of the node to effect the change in operation of the circuit, and wherein the pre-conditioning circuitry is configured to apply a voltage, current or charge directly to the node to reduce the magnitude of the change to the state of the node required by the circuit to achieve the change in operation of the circuit.
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公开(公告)号：US11855597B2
公开(公告)日：2023-12-26
申请号：US17741180
申请日：2022-05-10
Inventor： Sameer Baveja , Hamed Sadati
CPC classification number: H03F3/45479 , H03F1/26 , H03F1/52 , H03F2200/03 , H03F2200/153 , H03F2200/78
Abstract: This application relates to circuitry for monitoring for instability of an amplifier. The amplifier (100) has a first signal path between an amplifier input (INN) and an amplifier output (VOUT) and a feedback path from the output to form a feedback loop with at least part of the first signal path. A comparator (212) has a first input configured to receive a first signal (INN) derived from a first amplifier node which is part of said feedback loop and a second input configured to receive a second signal (INP) derived from a second amplifier node which varies with the signal at the amplifier input but does not form part of said feedback loop. The comparator is configured to compare the first signal to the second signal and generate a comparison signal (COMP), wherein in the event of amplifier instability the comparison signal comprises a characteristic indicative of amplifier instability.
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Patent Agency Ranking
公开(公告)号：US11522528B2
公开(公告)日：2022-12-06
申请号：US17086728
申请日：2020-11-02
Inventor： Gary Robertson , Hamed Sadati , Rupesh Khare , Sameer Baveja
Abstract: This application relates to methods and apparatus for voltage control, and in particular to maintain safe voltages for components of audio driving circuits that are operable in a high voltage mode. An audio driving circuit (100) may include a power supply module (106) and may be operable such that, in use, a voltage magnitude at a source terminal of at least a first transistor (306, 309, 603, 605) of the audio driving circuit can exceed its gate-source voltage tolerance. A voltage generator (111 P) is configured to output a first intermediate voltage (VSAFEP) to an intermediate voltage path for use as a gate control voltage for at least the first transistor, to maintain its gate-source voltage below tolerance. An intermediate path voltage clamp (114P) is provided for selectively clamping the intermediate voltage path to a voltage level, so as to maintain the magnitude of the gate-source voltage of the first transistor below tolerance. The voltage clamp (114P) is enabled by a reset condition (RST) for the audio driving circuit.
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公开(公告)号：US11469753B1
公开(公告)日：2022-10-11
申请号：US17365201
申请日：2021-07-01
Inventor： Hamed Sadati , Yu Tamura
Abstract: A switching driver circuit may have an output stage having an output switch connected between a switching voltage node and an output node. A switch network may control a switching voltage at the switching voltage node so that in one mode the switching voltage node is coupled to a positive voltage and in another mode the switching voltage node is coupled to ground voltage via a first switching path of the switch network. The circuit may also include an n-well switching block operable to, when the first switching voltage node is coupled to a positive voltage, connect the n-well of the first output switch to the switching voltage node, and, when the first switching voltage node is coupled to the ground voltage, connect the n-well of the first output switch to a first ground which is separate to the first switching voltage node and independent of the first switching path.
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公开(公告)号：US11368134B2
公开(公告)日：2022-06-21
申请号：US17028059
申请日：2020-09-22
Inventor： Sameer Baveja , Hamed Sadati
Abstract: This application relates to circuitry for monitoring for instability of an amplifier. The amplifier (100) has a first signal path between an amplifier input (INN) and an amplifier output (VOUT) and a feedback path from the output to form a feedback loop with at least part of the first signal path. A comparator (212) has a first input configured to receive a first signal (INN) derived from a first amplifier node which is part of said feedback loop and a second input configured to receive a second signal (INP) derived from a second amplifier node which varies with the signal at the amplifier input but does not form part of said feedback loop. The comparator is configured to compare the first signal to the second signal and generate a comparison signal (COMP), wherein in the event of amplifier instability the comparison signal comprises a characteristic indicative of amplifier instability.
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公开(公告)号：US11848652B2
公开(公告)日：2023-12-19
申请号：US17741149
申请日：2022-05-10
Inventor： Sameer Baveja , Hamed Sadati
CPC classification number: H03F3/45479 , H03F1/26 , H03F1/52 , H03F2200/03 , H03F2200/153 , H03F2200/78
Abstract: This application relates to circuitry for monitoring for instability of an amplifier. The amplifier (100) has a first signal path between an amplifier input (INN) and an amplifier output (VOUT) and a feedback path from the output to form a feedback loop with at least part of the first signal path. A comparator (212) has a first input configured to receive a first signal (INN) derived from a first amplifier node which is part of said feedback loop and a second input configured to receive a second signal (INP) derived from a second amplifier node which varies with the signal at the amplifier input but does not form part of said feedback loop. The comparator is configured to compare the first signal to the second signal and generate a comparison signal (COMP), wherein in the event of amplifier instability the comparison signal comprises a characteristic indicative of amplifier instability.
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公开(公告)号：US11385666B1
公开(公告)日：2022-07-12
申请号：US17339274
申请日：2021-06-04
Inventor： Hamed Sadati , John A. Breslin , Sushanth Hegde , John L. Melanson
IPC: G05F1/56
Abstract: Circuitry comprising: a capacitor; first circuitry; and second circuitry, wherein the circuitry is operable to couple the capacitor to the first circuitry when the first circuitry is active, and to couple the capacitor to the second circuitry when the first circuitry is inactive or is not actively using the capacitor.
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