Qualcomm Incorporated

Arpit Gupta

Bhushan Shanti Asuri

Vinod Panikkath

Krishnaswamy Thiagarajan

Wu-Hsin Chen

Ayush Mittal

Masoud Moslehi Bajestan

Sreenivasa Mallia

In certain aspects, a system includes a voltage-controlled oscillator (VCO), a phase detector configured to receive a reference signal, a frequency divider coupled between an output of the VCO and the phase detector, a phase-to-current circuit coupled to an output of the phase detector, and a temperature circuit configured to output a temperature-dependent voltage. The system also includes a switching circuit configured to selectively couple the phase-to-current circuit to an input of the VCO and configured to selectively couple the temperature circuit to the input of the VCO.

Dual-path phase locked loop (PLL) with closed-loop VCO temperature compensation

Certain aspects of the present disclosure provide an amplifier. The amplifier generally includes an amplifier core circuit configured to amplify a radio frequency signal and having a first output and a second output; a transformer coupled to the amplifier core circuit, the transformer having a primary winding and a secondary winding, the primary winding being coupled to the first output and the second output of the amplifier core circuit, the secondary winding being coupled to an output node of the amplifier; and a variable resistance circuit coupled in parallel with the primary winding.

Wideband amplifier

Growing community of inventors

San Diego, CA, United States of America

Arpit Gupta