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:
Jan. 26, 1988
Filed:
Feb. 03, 1987
Toshio Aota, Soma, JP;
Alps Electric Co., Ltd., , JP;
Abstract
A voltage-controlled-oscillator with a modulator, comprising a first variable capacitance diode, a second variable capacitance diode, and a third variable capacitance diode. The second variable capacitance diode is connected in series with the third variable capacitance diode to form a serial connection member. The first variable capacitance diode is connected in parallel to the serial connection member to form a resonance device, wherein capacitance of the first variable capacitance diode is controlled by applying an oscillation frequency control voltage to the first variable capacitance diode, and capacitance of the second variable capacitance diode is controlled by applying a modulation signal to the second variable capacitance diode, and capacitance of the third variable capacitance diode is controlled in a reverse direction to changes in the capacitance of the first variable capacitance diode by applying a reverse bias voltage and the oscillation frequency control voltage to the third variable capacitance diode to thereby provide a frequency modulated wave.