公开(公告)号：DE2329643A1

公开(公告)日：1974-01-24

申请号：DE2329643

申请日：1973-06-09

Applicant: IBM

Inventor： PLATT STEVEN ,  POMERANZ JEHOSHUA NAPHTALI ,  TEWARSON DINESH KUMAR

IPC: H03F3/45 ,  H03K5/003 ,  H03K19/018 ,  H03K19/082 ,  H03K5/00

Abstract: A signal voltage level translating circuit receives an input electrical signal having predetermined voltage swings about a first predetermined voltage level and translates the voltage level of the signal so that at the output there is provided an output electrical signal having the same voltage swings about a second predetermined voltage level translated with respect to the first voltage level. An input transistor has its base connected to the input node and its emitter connected to one end of a first impedance element having its other end connected to the collector of a current source transistor. A fixed reference voltage is applied to the base of a reference voltage transistor having its emitter connected to one end of a second impedance element having an impedance equal to that of the first impedance element. The other end of the second impedance element is connected to the collector of a diode-connected transistor having its base connected to the base of the current source transistor. The emitter of the diode-connected transistor is connected to the emitter of the current source transistor. If implemented in the form of a monolithic integrated circuit, the diode-connected transistor and current source transistor may have the same base and the same emitter. The translated signal is taken at the output where the first impedance element is connected to the collector of the current source transistor.