US 10,476,437 B2 · Multimode voltage tracker circuit

Abstract

A multimode voltage tracker circuit is provided. The multimode voltage tracker circuit is configured to generate a modulated voltage for amplifying a radio frequency (RF) signal(s), which may be modulated in a wide range of modulation bandwidth. In one non-limiting example, the multimode voltage tracker circuit can be configured to operate in a low modulation bandwidth (LMB) mode to generate an average power tracking (APT) modulated voltage for amplifying the RF signal(s) when the RF signal(s) is modulated in a lower modulation bandwidth (e.g., <50 KHz). As such, the multimode voltage tracker circuit can be adapted to support lower bandwidth communications in an Internet-of-Things (IoT) network with improved efficiency, stability, and performance.

Claims22

Dependent claims

A multimode voltage tracker circuit comprising:

an input node configured to receive a modulated target voltage;
an output node configured to output a modulated voltage;
an envelope tracking (ET) tracker circuit coupled between the input node and the output node, the ET tracker circuit is configured to generate the modulated voltage at the output node based on the modulated target voltage;
and
a control circuit configured to:
determine whether the ET tracker circuit is configured to operate in a low modulation bandwidth (LMB) mode;
and
control the ET tracker circuit to generate an average power tracking (APT) modulated voltage at the output node based on the modulated target voltage in response to the ET tracker circuit being configured to operate in the LMB mode.

5 more elements

Dependencies are inferred from the claim text.

Multimode voltage tracker circuit

Life of this patent

Multimode voltage tracker circuit

Life of this patent

Abstract

Claims22