Skyworks Solutions, Inc.

Analog Devices International Unlimited Company

Ionel Gheorghe

Florinel G Balteanu

Tirdad Sowlati

Rajasekhar Pullela

David J McLaurin

Christopher W Angell

Justin L Fortier

Mostafa Haroun

Xing Zhou

Oscar S Burbano

Systems, devices, and methods related to frequency converter arrangements are provided. For example, a frequency converter arrangement converts a first signal centered at a first frequency to a second signal centered at a second frequency different from the first frequency. The frequency converter arrangement includes local oscillator (LO) circuitry and in-phase, quadrature-phase (IQ) mixer circuitry coupled to the LO circuitry. The LO circuitry includes duty cycle correction circuitry to adjust a duty cycle of a pair of input clock signals. The duty cycle correction circuitry includes coarse tuning circuitry responsive to a digital calibration code, and analog tuning loop circuitry. The LO circuitry further includes quadrature divider circuitry coupled to an output of the duty cycle correction circuitry, where the quadrature divider circuitry generates an in-phase LO signal and a quadrature-phase LO signal from a pair of output clock signals at outputs of the duty cycle correction circuitry.

Analog tracking circuit to improve dynamic and static image rejection of a frequency converter

An amplitude calibration element comprises a linear driver configured to receive the output of a modulator, the modulator output comprising a voltage signal having an amplitude modulated (AM) portion, a differential detector configured to receive an output of the linear driver and develop a differential signal corresponding to the AM portion, and a differential comparator configured to receive the output of the differential detector and a differential reference signal, the differential comparator configured to develop a gain control signal to control the gain of the linear driver.

Amplitude calibration element for an enhanced data rates for GSM evolution (EDGE) polar loop transmitter

Growing community of inventors

Ottawa, Canada

Ionel Gheorghe