Patent ID: 6121818
Filing Date: 2000-09-19
Classification: H03D

Abstract:
A mixer using a replica voltage-current converter, comprising:a voltage-current (V-I) transformer including an input amplifier and the replica voltage-current (R. V-I) converter, the replica voltage-current converter generating feedback signals to the input amplifier, wherein said voltage-current (V-I) transformer further includes a main voltage-current (M. V-I) converter for converting a differential voltage outputted from said input amplifier to a differential current and for supplying the differential current as an input of said balanced mixer; load resistors connected to said replica voltage-current (R. V-I) converter for converting differential current output of said replica voltage-current (R. V-I) converter to a voltage level between an output node of said replica voltage-current (R. V-I) converter and a ground node; and feedback resistors for feedbacking a voltage which is applied to both ends of each of said two load resistors connected to said replica voltage-current (R. V-I) converter as the input of said input amplifier;a balanced mixer connected to said voltage-current (V-I) transformer, for outputting modulated current outputs; andtwo load resistors connected to said balanced mixer, for converting said modulated current outputs to a voltage output terminal.