公开(公告)号：US20230208362A1

公开(公告)日：2023-06-29

申请号：US17646405

申请日：2021-12-29

Applicant: QUALCOMM Incorporated

Inventor： Cheng TAN ,  Bruce Charles FISCHER, JR. ,  Brian FRENCH

IPC: H03F1/02 ,  H03F3/19 ,  H04B1/40

CPC classification number: H03F1/0233 ,  H03F3/19 ,  H04B1/40 ,  H03F2200/451 ,  H03F2200/105

Abstract: An envelope detection circuit and methods for detecting an envelope of a signal using such an envelope detection circuit. One example envelope detection circuit generally includes a first diode, a capacitive element, and a clamping circuit. The first diode has an anode coupled to an input node of the envelope detection circuit and has a cathode coupled to an output node of the envelope detection circuit. The capacitive element is coupled in shunt between the output node and a reference potential node, and the clamping circuit is coupled in shunt between the input node and the reference potential node. The clamping circuit generally includes a resistive element coupled in series with a second diode.

公开(公告)号：US20230098404A1

公开(公告)日：2023-03-30

申请号：US17486745

申请日：2021-09-27

Applicant: QUALCOMM Incorporated

Inventor： Cheng TAN ,  Lei SUN ,  Sean Vincent MASCHUE ,  Bruce Charles FISCHER, JR. ,  Brian FRENCH

IPC: H04B3/48 ,  H03F3/24

Abstract: Certain aspects of the present disclosure provide techniques for determining a cable loss associated with a transmission cable of an apparatus. An example method includes sending, to a radio modem of the apparatus, a request for the radio modem to use a target power when sending one or more signals to the signal compensator device for determining a cable loss associated with a transmission cable communicatively coupling the radio modem with the signal compensator device, receiving, at a signal compensator device of the apparatus, the one or more signals from the radio modem sent using the target power, and determining the cable loss associated with the transmission cable based on the one or more signals.