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:
May. 27, 2008
Filed:
Jun. 28, 2002
Hiroshi Miyagi, Niigata, JP;
Hiroshi Miyagi, Niigata, JP;
Niigata Seimitsu Co., Ltd., Niigata, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An oscillator capable of reducing a noise component when partly formed by using the CMOS process or the MOS process. A high-frequency amplifier circuit, a mixing circuit, a local oscillator, intermediate-frequency filters, an intermediate-frequency amplifier circuit, a limit circuit, an FM detection circuit, and a stereo demodulation circuit which constitute an FM receiver are formed as a one-chip component. The local oscillatoris formed on a semiconductor substrate by using the CMOS process or the MOS process and the transistors constituting the circuit are p-channel type FETs. Moreover, the local oscillatorhas a resonance circuit whose one end is connected to a DC bias circuit composed of a resistorand the center voltage of the oscillation is set to a value higher than 0 V.