The TRF1500 is a dual-band/dual-mode personal communications system (PCS) receiver for cellular telephones operating dual mode (analog and digital) in the 800-MHz band and single mode (digital) in the 1900-MHz band. The TRF1500 consists of a low-noise amplifier (LNA) and mixer for each band. The high band uses an image rejection mixer for down conversion while the low band relies on an off-chip image rejection filter between the LNA and mixer.