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公开(公告)号：US12206376B2
公开(公告)日：2025-01-21
申请号：US16943626
申请日：2020-07-30
Applicant: pSemi Corporation
Inventor： Ravindranath Shrivastava , Peter Bacon
Abstract: A phase shifter cell and multiple coupled phase shifter cells that mitigate signal glitches arising from phase state changes by a combination of design architecture and control signal timing. Specifically, one or more of the following three concepts are employed to mitigate insertion loss glitches and control phase behavior during phase state transitions: the timing of switching for each switched half-cell (e.g., including series and/or shunt reactance elements, such as inductors and/or capacitors) within a phase shifter cell is controlled in such a way that the reactance elements do not all switch at the same time; use of a “make before break” timing scheme for combination or “multi-state” phase shifter cells; and/or arranging the timing of each phase shifter cell in a set of multiple coupled phase shifter cells such that the individual cells do not all switch at the same time.
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公开(公告)号：US11075612B2
公开(公告)日：2021-07-27
申请号：US16893958
申请日：2020-06-05
Applicant: pSemi Corporation
Inventor： Eric S. Shapiro , Peter Bacon
IPC: H03H7/20
Abstract: A phase shifter unit cell or a connected set of such cells that can be well isolated from external circuitry and which do not introduce insertion loss into an RF signal path, exhibit good return loss, and further provides additional advantages when combined with bracketing attenuator circuits. More particularly, embodiments integrate a high-isolation function within a phase shifter circuit by breaking the complimentary nature of the control signals to a phase shifter cell to provide greater control of switch states internal to the phase shifter cell and thus enable a distinct high-isolation state, and by including a switchable shunt termination resistor for use in the high-isolation state. Some embodiments are serially coupled to attenuator circuits to enable synergistic interaction that reduces overall die size and/or increases isolation. One such embodiment positions a high-isolation phase shifter cell in accordance with the present invention between bracketing programmable attenuators.
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公开(公告)号：US20200373898A1
公开(公告)日：2020-11-26
申请号：US16893958
申请日：2020-06-05
Applicant: pSemi Corporation
Inventor： Eric S. Shapiro , Peter Bacon
IPC: H03H7/20
Abstract: A phase shifter unit cell or a connected set of such cells that can be well isolated from external circuitry and which do not introduce insertion loss into an RF signal path, exhibit good return loss, and further provides additional advantages when combined with bracketing attenuator circuits. More particularly, embodiments integrate a high-isolation function within a phase shifter circuit by breaking the complimentary nature of the control signals to a phase shifter cell to provide greater control of switch states internal to the phase shifter cell and thus enable a distinct high-isolation state, and by including a switchable shunt termination resistor for use in the high-isolation state. Some embodiments are serially coupled to attenuator circuits to enable synergistic interaction that reduces overall die size and/or increases isolation. One such embodiment positions a high-isolation phase shifter cell in accordance with the present invention between bracketing programmable attenuators.
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公开(公告)号：US10224913B2
公开(公告)日：2019-03-05
申请号：US15365564
申请日：2016-11-30
Applicant: pSemi Corporation
Inventor： Jianhua Lu , Peter Bacon , Naveen Yanduru , Edward Nicholas Comfoltey , Michael Conry , Chieh-Kai Yang
Abstract: A fast response time, self-activating, adjustable threshold limiter including a limiting element LE, a first coupling element CE1 electrically connected from a signal node of LE to a control input of LE, and a second coupling element CE2 electrically connected from the control input of LE to a nominal node of LE. An initial bias (control) voltage is also supplied to the control input of LE to dynamically control the limiting threshold for the limiter. Embodiments include usage of self-activating adjustable power limiters in combination with series switch components in a switch circuit in lieu of conventional shunt switches.
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公开(公告)号：US10172231B2
公开(公告)日：2019-01-01
申请号：US15176940
申请日：2016-06-08
Applicant: pSemi Corporation
Inventor： Gregory Louis Horvath , Peter Bacon
Abstract: Systems, methods, and apparatus for reducing crossover coupling of two or more RF signals are described. In one case, a crossover structure is described where RF signals are routed through coplanar waveguides having a specific characteristic impedance and crossing at a central point of the crossover structure by way of a bridge. A ground shield having a geometry adapted to reduce the crossover coupling while minimally affecting capacitive coupling between the RF signals and the ground shield is introduced in-between a region comprising the central point. Further described is a multi-port rotary RF switch fitted with the crossover structure which allows substantially balanced electrical performance across all the operational states of the rotary RF switch at RF signal frequencies up to 40 GHz and beyond.
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Patent Agency Ranking
公开(公告)号：US12278657B2
公开(公告)日：2025-04-15
申请号：US18585690
申请日：2024-02-23
Applicant: pSemi Corporation
Inventor： Rong Jiang , Khushali Shah , Peter Bacon
Abstract: A clamping circuit that may be used to provide efficient and effective voltage clamping in an RF front end. The clamping circuit comprises two series coupled signal path switches and a bypass switch coupled in parallel with the series coupled signal path switches. A diode is coupled from a point between the series coupled signal path switches to a reference potential. In addition, an output selection switch within an RF front end has integrated voltage clamping to more effectively clamp the output voltage from the RF front end. Additional output clamping circuits can be used at various places along a direct gain signal path, along an attenuated gain path and along a bypass path.
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公开(公告)号：US20230091678A1
公开(公告)日：2023-03-23
申请号：US17889827
申请日：2022-08-17
Applicant: pSemi Corporation
Inventor： Peter Bacon
Abstract: Circuits and methods that enable stable and reliable “hot switching” from one antenna to another without turning RF power to the antennas OFF in wireless RF systems during at least some transmission events. One embodiment comprises an RF switch circuit including a common port configured to pass an RF signal, a plurality of switch arms each coupled to the common port and including an associated port, and a shunt termination impedance selectively couplable to the common port through a switch. Another embodiment comprises a method for switching an RF signal applied to a common port of a switch from a first switch arm initially in an ON state to a second switch arm initially in an OFF state, including: setting the second switch arm to the ON state, and then setting the first switch arm to the OFF state.
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公开(公告)号：US11563455B1
公开(公告)日：2023-01-24
申请号：US17550824
申请日：2021-12-14
Applicant: pSemi Corporation
Inventor： Peter Bacon
Abstract: Circuits and methods that provide fine-resolution measurements of RF signal power within a communication system band, thereby more accurately measuring RF interference or the potential of RF interference. One aspect of embodiments of the present invention is a narrow-band tunable filter that includes two elements coupled in series, a periodic passband filter and a tunable filter. The purpose of the periodic passband filter is to generate multiple periodic passbands for an applied RF signal. The purpose of the tunable filter is to generate a single passband, generally with a tunable center frequency. By serially coupling the two filter types in either order, the single passband of the tunable filter is superimposed over one of the periodic passbands of the periodic passband filter, synergistically resulting in an extremely narrow passband.
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公开(公告)号：US11329642B1
公开(公告)日：2022-05-10
申请号：US17202003
申请日：2021-03-15
Applicant: pSemi Corporation
Inventor： Ravindranath D. Shrivastava , Simon Willard , Peter Bacon
IPC: H03K17/687 , H03K17/0412
Abstract: Methods and devices to improve the switching speed of radio frequency FET switch stacks are disclosed. The described methods and devices are based on bypassing drain-sources resistors when the FET switch stack is transitioning from an ON to an OFF state. Several implementations of the disclosed teachings are also presented.
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公开(公告)号：US20220021367A1
公开(公告)日：2022-01-20
申请号：US17381885
申请日：2021-07-21
Applicant: pSemi Corporation
Inventor： Eric S. Shapiro , Peter Bacon
IPC: H03H7/20
Abstract: A phase shifter unit cell or a connected set of such cells that can be well isolated from external circuitry and which do not introduce insertion loss into an RF signal path, exhibit good return loss, and further provides additional advantages when combined with bracketing attenuator circuits. More particularly, embodiments integrate a high-isolation function within a phase shifter circuit by breaking the complimentary nature of the control signals to a phase shifter cell to provide greater control of switch states internal to the phase shifter cell and thus enable a distinct high-isolation state, and by including a switchable shunt termination resistor for use in the high-isolation state. Some embodiments are serially coupled to attenuator circuits to enable synergistic interaction that reduces overall die size and/or increases isolation. One such embodiment positions a high-isolation phase shifter cell in accordance with the present invention between bracketing programmable attenuators.
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