Rf transmiter integrated circuit including crystal-less vco and electronic tag including the same

Abstract

The present specification provides a crystal-less radio frequency (RF) transmitter for correcting frequency depending on temperature. The RF transmitter may include: an antenna that transmits an RF signal; a temperature sensor that measures ambient temperature; a digitally controlled oscillator (DCO) that digitally controls an output frequency for the RF signal; a frequency control and locking circuit (FCLC) that performs frequency locking related to correction of the output frequency; a digital-to-analog converter (DAC) that transmits a control voltage to the DCO based on a digital code received from the FCLC; and a memory in which a look up table (LUT) that corrects the output frequency based on the temperature is stored.

Dependencies are inferred from the claim text.