Patent ID: 8723588

Claim:
A mixer circuit, comprising: a voltage-current conversion unit that converts a first signal that comprises a voltage signal to a current signal and supplies a resulting current signal as output; a first path selector that includes a first input terminal to which is applied as input the first signal that is supplied from said voltage-current conversion unit and a plurality of first output terminals, that switches a connection relationship among said first input terminal and said first output terminals responsive to a state of a signal group that comprises a group of signals included in a four-phase clock signal, and that includes a plurality of second signals that are multiplied by said first signal, and that supplies, separately from each first output terminal, a plurality of third signals obtained by multiplying each of said plurality of second signals by said first signal, said first path selector multiplying said second signals by said first signal by switching the connection relationship of said first input terminal of said first path selector and said first output terminals of said first path selector; a second path selector coupled to said first path selector that includes a plurality of second input terminals to which each of said third signals is applied and a plurality of second output terminals, that switches a connection relationship among said second input terminals and said second output terminals responsive to a state of a fourth signal that switches the connection relationship of said second input terminals and said second output terminals, and that supplies said third signals that were applied as input to respective second input terminals from the second output terminals that are connected to the second input terminals; a first load unit that is connected to said first output terminals for smoothing said third signals; and a second load unit that is connected to said second output terminals for converting said third signals to voltage signals, wherein said group of signals that switch the connection relationship among said first input terminal and said first output terminals in the first path selector are different from said fourth signal that switch the connection relationship among said second input terminals and said second output terminals in the second path selector.