Patent ID: 6011966
Filing Date: 2000-01-04
Classification: H01P

Abstract:
A mixer input circuit for converting a signal from a tuning section into a balanced signal and outputting the balanced signal, said mixer input circuit comprising:a distributed constant tuning circuit section having a distributed constant line including a first central conductor to which an imbalanced RF signal is connected and a second central conductor coupled to said first central conductor;an imbalance-balance conversion section having a third central conductor of said distributed constant line coupled to said second central conductor of said distributed constant line in said distributed constant tuning circuit; anda mixer having a pair of input terminals to which a balanced output signal from said imbalance-balance conversion section is supplied, wherein a respective phase and a respective amplitude of the balanced output signal are adjusted relative to each other by connecting a pair of impedance elements in series between respective ends of said third central conductor of said distributed constant line and respective ones of said pair of input terminals of the mixer.