A downconversion apparatus comprising: a first set of transistors and a second set of transistors coupled to sources of the transistors in the first set and operative to switch transconductance of the transistors in the first set based on local oscillator, LO signals, wherein the second set of transistors comprises a plurality of differential pairs operative to receive a differential inphase I local oscillator signal and a plurality of differential pairs operative to receive a differential quadrature Q local oscillator signal and wherein the first set of transistors is operative to receive a modulated signal and provide baseband signals; characterised in that: the second set of transistors comprises a first differential pair operative to receive non-inverted and inverted inphase, I, LO signals, a second differential pair operative to receive non-inverted and inverted quadrature, Q LO signals, a third differential pair operative to receive the non-inverted and inverted I LO signals, and a fourth differential pair operative to receive the non-inverted and inverted Q LO signals; and the apparatus further comprises: a third set of transistors coupled as inverters coupled to the second set of transistors and operative to enable and disable the transistors in the second set based on a voltage-controlled oscillator VCO signal; wherein the third set of transistors coupled as inverters comprises a first pair of transistors (722,732) coupled as a first inverter and operative to enable and disable the first differential pair based on a non-inverted VCO signal, a second pair of transistors (724,734) coupled as a second inverter and operative to enable and disable the second differential pair based on an inverted VCO signal, a third pair of transistors (726,736) coupled as a third inverter and operative to enable and disable the third differential pair based on the inverted VCO signal, and a fourth pair of transistors (728,738) coupled as a fourth inverter and operative to enable and disable the fourth differential pair based on the non-inverted VCO signal. a first set of transistors and a second set of transistors coupled to sources of the transistors in the first set and operative to switch transconductance of the transistors in the first set based on local oscillator, LO signals, wherein the second set of transistors comprises a plurality of differential pairs operative to receive a differential inphase I local oscillator signal and a plurality of differential pairs operative to receive a differential quadrature Q local oscillator signal and wherein the first set of transistors is operative to receive a modulated signal and provide baseband signals; characterised in that: the second set of transistors comprises a first differential pair operative to receive non-inverted and inverted inphase, I, LO signals, a second differential pair operative to receive non-inverted and inverted quadrature, Q LO signals, a third differential pair operative to receive the non-inverted and inverted I LO signals, and a fourth differential pair operative to receive the non-inverted and inverted Q LO signals; and the second set of transistors comprises a first differential pair operative to receive non-inverted and inverted inphase, I, LO signals, a second differential pair operative to receive non-inverted and inverted quadrature, Q LO signals, a third differential pair operative to receive the non-inverted and inverted I LO signals, and a fourth differential pair operative to receive the non-inverted and inverted Q LO signals; and the apparatus further comprises: a third set of transistors coupled as inverters coupled to the second set of transistors and operative to enable and disable the transistors in the second set based on a voltage-controlled oscillator VCO signal; wherein the third set of transistors coupled as inverters comprises a first pair of transistors (722,732) coupled as a first inverter and operative to enable and disable the first differential pair based on a non-inverted VCO signal, a second pair of transistors (724,734) coupled as a second inverter and operative to enable and disable the second differential pair based on an inverted VCO signal, a third pair of transistors (726,736) coupled as a third inverter and operative to enable and disable the third differential pair based on the inverted VCO signal, and a fourth pair of transistors (728,738) coupled as a fourth inverter and operative to enable and disable the fourth differential pair based on the non-inverted VCO signal. a third set of transistors coupled as inverters coupled to the second set of transistors and operative to enable and disable the transistors in the second set based on a voltage-controlled oscillator VCO signal; wherein the third set of transistors coupled as inverters comprises a first pair of transistors (722,732) coupled as a first inverter and operative to enable and disable the first differential pair based on a non-inverted VCO signal, a second pair of transistors (724,734) coupled as a second inverter and operative to enable and disable the second differential pair based on an inverted VCO signal, a third pair of transistors (726,736) coupled as a third inverter and operative to enable and disable the third differential pair based on the inverted VCO signal, and a fourth pair of transistors (728,738) coupled as a fourth inverter and operative to enable and disable the fourth differential pair based on the non-inverted VCO signal.