公开(公告)号：US20240410922A1

公开(公告)日：2024-12-12

申请号：US18333300

申请日：2023-06-12

Applicant: Apple Inc.

Inventor： Mohamed Abouzied

IPC: G01R21/133 ,  G01R21/01

Abstract: Wireless circuitry is provided that includes a radio-frequency amplifier or mixer, a power detector coupled to an input or an output of the radio-frequency amplifier or mixer, and a transimpedance amplifier coupled to an output of the power detector. The transimpedance amplifier can be implemented as a class A amplifier, a class AB amplifier, or an enhanced class AB amplifier. The power detector can include an input transistor having a gate terminal configured to receive a radio-frequency signal, a bias transistor, and a voltage generator configured to apply a calibration voltage to a gate terminal of the bias transistor to mitigate a direct current (DC) offset associated with the power detector.

公开(公告)号：US20240305250A1

公开(公告)日：2024-09-12

申请号：US18182275

申请日：2023-03-10

Applicant: Apple Inc.

Inventor： Mohamed Abouzied

IPC: H03F1/52 ,  H03F3/21

CPC classification number: H03F1/523 ,  H03F3/21 ,  H03F2200/451

Abstract: Wireless circuitry can include a radio-frequency amplifier, a power detection circuit coupled to an output of the radio-frequency amplifier and configured to output a power detection voltage, protection circuitry coupled to the power detection circuit and configured to output a protection voltage, and a control circuit configured to adjust the amplifier based on the power detection voltage and the protection voltage. The protection circuitry can include a current mirroring circuit that outputs a current proportional to a supply current of the power detection circuit and an adjustable current-to-voltage converter such as an adjustable resistor that receives the current to generate the protection voltage. The control circuit can adjust the radio-frequency amplifier by tuning a supply voltage or a bias voltage of the radio-frequency amplifier to reduce the gain of the radio-frequency amplifier, thereby proactively preventing the amplifier from outputting signals with large swings that can potentially damage the wireless circuitry.

公开(公告)号：US20240305389A1

公开(公告)日：2024-09-12

申请号：US18181466

申请日：2023-03-09

Applicant: Apple Inc.

Inventor： Mohamed Abouzied ,  Abbas Komijani

IPC: H04B17/15

CPC classification number: H04B17/15

Abstract: Wireless circuitry can include a radio-frequency amplifier and a power detection circuit coupled to an output of the radio-frequency amplifier. The power detection circuit can include an input transistor, a biasing circuit configured to output a bias voltage for the input transistor and configured to track temperature and voltage variations, and a non-linearity cancellation component configured to generate a current that at least partially cancels a non-linear current associated with the input transistor. The input transistor may be an n-type transistor, and the non-linearity cancellation component may be a p-type metal-oxide-semiconductor capacitor. The biasing circuit can include n-type and p-type diode-connected bias transistors.