The Texas Instruments (TITM) TRF2020 is an integrated high performance frequency synthesizer device. The TRF2020 consists of one main 1.2-GHz synthesizer and two auxiliary 250-MHz synthesizers. Each synthesizer has an independent dual-modulus prescaler and separate powerdown modes. These features provide maximum flexibility for the design of 900-MHz wireless systems. The main synthesizer consists of a 32/33-modulus prescaler with an 11-bit counter, a phase-frequency detector, and a charge pump. The phase-frequency detector is referenced to an internal reference frequency that is derived from an external TCXO signal. The phase-frequency detector is also provided with a dead-zone compensation circuit that reduces synthesizer phase noise during locked conditions. Each auxiliary synthesizer consists of an independent 8/9-modulus prescaler with an 11-bit counter, a phase-frequency detector, and a charge pump. Similar to the main synthesizer, each auxiliary synthesizer's phase-frequency detector is referenced to an internal reference frequency that is derived from an external TCXO signal.