The PE4151 is an ultra-high linearity quad metal-oxide-semiconductor field-effect transistor (MOSFET) mixer with an integrated local oscillator (LO) amplifier. The LO amplifier allows for LO drive levels of less than 0 dBm to produce third-order intercept point (IIP3) values similar to a quad MOSFET array driven with a 15 dBm LO drive. It is designed for use in upconversion and downconversion applications and is ideal for highly magnetic environments such as medical applications. The PE4151 operates with differential signals at the RF and IF ports while the LO port can be either differential or single-ended.