The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2007
Filed:
May. 14, 2004
Jong Kee Kwon, Daejeon, KR;
Gyu Hyeong Cho, Daejeon, KR;
Mun Yang Park, Daejeon, KR;
Jong Dae Kim, Daejeon, KR;
Jong Kee Kwon, Daejeon, KR;
Gyu Hyeong Cho, Daejeon, KR;
Mun Yang Park, Daejeon, KR;
Jong Dae Kim, Daejeon, KR;
Abstract
Provided is an active load circuit of a voltage gain amplifier, which allows a high voltage gain with a low supply voltage operation in high-frequency range. The active load circuit includes a PMOS transistor which is connected between the amplifying unit and a power supply voltage and functions as a load element in a low frequency range; a negative feedback buffering unit which is connected to the gate of the PMOS transistor and functions as a common drain amplifier to stabilize the output voltage of the voltage gain amplifier and drive the voltage gain amplifier at a low voltage; and a capacitor which is connected to the negative feedback buffering unit and compensates for both an impedance and a frequency characteristics when the voltage gain amplifier operates in a high frequency range.