公开(公告)号：US20250003809A1

公开(公告)日：2025-01-02

申请号：US18345253

申请日：2023-06-30

Applicant: Apple Inc.

Inventor： Soheil GOLARA ,  Daniel Joel Bankman ,  Robin Gupta ,  Seyedeh Sedigheh Hashemi ,  Mansour Keramat

IPC: G01K7/01

Abstract: The present disclosure describes embodiments of a temperature sensor with full band PSR. The temperature sensor can include a reference voltage generator, a temperature circuit, and an analog-to-digital converter (ADC). The reference voltage generator is configured to generate a reference voltage. The temperature circuit is configured to operate under a substantially constant bias current and to generate a temperature signal proportional to temperature. The ADC is electrically coupled to the reference voltage generator and the temperature circuit and configured to convert the temperature signal to a digital representation based on a sampling frequency. The ADC comprises a frequency generator configured to generate a modulation frequency having a random variation. The sampling frequency is modulated by the modulation frequency.

公开(公告)号：US20240044717A1

公开(公告)日：2024-02-08

申请号：US17882043

申请日：2022-08-05

Applicant: Apple Inc.

Inventor： Soheil GOLARA ,  Mansour KERAMAT ,  Seyedeh Sedigheh HASHEMI

IPC: G01K7/01 ,  H03K17/687

CPC classification number: G01K7/01 ,  H03K17/6872

Abstract: The present disclosure describes embodiments of a compact low voltage CMOS-based temperature sensor. The CMOS-based temperature sensor can include a reference voltage generator, a temperature front-end circuit, and an analog-to-digital converter (ADC). The reference voltage generator can be configured to generate a reference voltage independent of temperature. The temperature front-end circuit can include first and second transistors configured to generate a temperature signal proportional to temperature. The first MOS transistor can include first and second terminals. The first terminal can be electrically coupled to the reference voltage. The second terminal can be electrically coupled to the second MOS transistor. The second terminal can provide the temperature signal. The ADC can be electrically coupled to the reference voltage and configured to convert the temperature signal to a digital signal.