Patent ID: 11923861
Assignee: QUALCOMM INCORPORATED
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus, comprising:
a first upper voltage rail;
a first lower voltage rail; and
a voltage controlled oscillator (VCO), comprising:
at least one second upper voltage rail;
at least one second lower voltage rail;
a ring oscillator (RO) including a set of N cascaded inverters arranged in a ring, wherein the set of N cascaded inverters are coupled between the at least one second upper voltage rail and the at least one second lower voltage rail, wherein N is a positive integer number;
at least one first frequency band select circuit coupled between the first upper voltage rail and the at least one second upper voltage rail, respectively;
at least one second frequency band select circuit coupled between the at least one second lower voltage rail and the first lower voltage rail, respectively;
at least one first VCO frequency control circuit coupled between the first upper voltage rail and the at least one second upper voltage rail, respectively; and
at least one second VCO frequency control circuit coupled between the at least one second lower voltage rail and the first lower voltage rail, respectively.