Switched-capacitor based RF mixer

New integration technologies yield devices capable to perform at very high frequencies. However shrinked dimensions also result in modest maximum operating voltages. Switched capacitor circuit techniques are associated with low frequency operation but when implemented in those advanced CMOS technologies are able to operate at GHz frequencies. Integrated RF active mixers are always based on circuit topologies directly derived from the Gilbert multiplier cell, a configuration that suffers in low supply voltage situations as those mandated by newest technologies. The proposed circuit uses charge transfer methods to implement a mixer that can operate at GHz frequencies with adequate performance and can make use of circuit topologies better tailored to low voltage operation.