Patent ID: 8674755
Filing Date: 2014-03-18
Classification: H03F,H03H,Y10T

Abstract:
1. A differential amplifier comprising: a first device and a second device series coupled between two power supplies; a third device and a fourth device series coupled between said two power supplies; a first AC input signal capacitively coupled to said first device by a capacitor of a first RC network; said first AC input signal capacitively coupled to said fourth device by a capacitor of a fourth RC network; a first DC voltage coupled to said first device by a resistor of said first RC network; a second DC voltage coupled to said fourth device by a resistor of said fourth RC network; a complement of said first AC input signal capacitively coupled to said third device by a capacitor of a third RC network; said complement of said first AC input signal capacitively coupled to said second device by a capacitor of a second RC network; said first DC voltage coupled to said third device by a resistor of said third RC network; said second DC voltage coupled to said second device by a resistor of said second RC network; a reference current; and a fifth device connected in saturation providing a load for said reference current, thereby generating said second DC voltage.