Patent ID: 6222391
Filing Date: 2001-04-24
Classification: H03K

Abstract:
A semiconductor integrated circuit comprising:a first resistor supplied with a first reference potential at one end thereof;a first diode having an anode supplied with said first reference potential and a cathode connected commonly with the other end of said first resistor;a first npn bipolar transistor having a collector connected to the other end of said first resistor and the cathode of said first diode which are commonly connected, and having a base supplied with a first input signal;a second resistor having one end connected to the emitter of said first npn bipolar transistor and the other end supplied with a second reference potential;a third resistor having one end supplied with said first reference potential;a second diode having an anode supplied with said first reference potential and a cathode connected commonly with the other end of said third resistor;a second npn bipolar transistor having a collector connected to the other end of said third resistor and the cathode of said second diode which are commonly connected, and having a base supplied with a second input signal;a fourth resistor having one end connected to the emitter of said second npn bipolar transistor and the other end supplied with said second reference potential; anda differential ECL circuit supplied with a first differential input signal and a second differential input signal, said first differential input signal being a potential signal appearing at a first connection node where the other end of said first resistor and the cathode of said first diode are connected to the collector of said first npn bipolar transistor, and said second differential input signal being a potential signal appearing at a second connection node where the other end of said third resistor and the cathode of said second diode are connected to the collector of said second npn bipolar transistor.