The PMB 2402 is a single-chip single-conversion heterodyn PM-receiver with phase shifting circuitry for the I/Q-phase baseband demodulation on chip. It also includes the second local oscillator, a gain controlled second IF-amplifier, two differential operational amplifiers for baseband filtering purposes and power down circuitry. The PMB 2402 is designed for digital mobile telephones according to the GSM-standard and other digital systems.