電流-モード利得分割デュアル-パスVCO

Japanese Patent JP2009523394

A

Techniques to effectively handle large voltage-controlled oscillator (VCO) gain are described. The techniques utilize (1) a slow high-gain path to provide an average control current that adjusts the center frequency of a VCO and (2) a fast low-gain path to provide an instantaneous control current that adjusts the VCO frequency during normal operation. In one design, the VCO includes a voltage-to-current converter, a current amplifier, a summer, and a current-controlled oscillator (ICO). The voltage-to-current converter receives a control voltage and generates a first current and a second current. The current amplifier amplifies and filters the first current and generates a third current. The summer sums the second current and the third current and generates a control current. The ICO receives the control current and generates an oscillator signal having a frequency determined by the control current.

WO/2012/041413	INTEGRATED CIRCUIT DEVICE FOR COMPENSATING FREQUENCY DRIFT OF A CONTROLLABLE OSCILLATOR
JP2001119273	VOLTAGE CONTROLLED OSCILLATION CIRCUIT
JP5702391	Oscillators, frequency synthesizers and network nodes for use in communication networks

Kuan, Xiao Hong
Pedrali-Neu, Marzo

JP2008550527A

June 18, 2009

January 11, 2007

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QUALCOMM INCORPORATED

H03L7/099; H03K3/354; H03L7/10

JP2003229764A	2003-08-15
JPH0437219A	1992-02-07
JPH11168378A	1999-06-22

US6163186A

2000-12-19

Takehiko Suzue
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen

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