Single to differential conversion circuit and analog front-end circuit

• Main Authors: KAWATA GO, ITAKURA TETSURO, FUNAKI HIDEYUKI, KIMURA SHUNSUKE, FURUTA MASANORI
• Format: Patent
• Language: English
• Published: 10.06.2015
• Subjects: AMPLIFIERS; BASIC ELECTRONIC CIRCUITRY; CONTROLLING; ELECTRICITY; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

There is provided a single to differential conversion circuit including: a divider circuit, first and second bias current generators, first and second output terminals and a current generating circuit. The divider circuit receives an input current including a DC component and an AC component and divides the input current to generate a first current and a second current. The first bias current generator generates a first bias current. The first output terminal outputs a first output current depending on a difference between the first current and the first bias current. The current generating circuit generates a third current which has a sign opposite to the second current on the basis of the second current. The second bias current generator generates a second bias current. The second output terminal outputs a second output current depending on a difference between the third current and the second bias current.