TW200620836A - Low noise charge pump for PLL-based frequence synthesis - Google Patents
Low noise charge pump for PLL-based frequence synthesisInfo
- Publication number
- TW200620836A TW200620836A TW093137161A TW93137161A TW200620836A TW 200620836 A TW200620836 A TW 200620836A TW 093137161 A TW093137161 A TW 093137161A TW 93137161 A TW93137161 A TW 93137161A TW 200620836 A TW200620836 A TW 200620836A
- Authority
- TW
- Taiwan
- Prior art keywords
- charge
- pump
- pll
- low noise
- charge pump
- Prior art date
Links
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
A low noise charge pump for use in a PLL-based frequency synthesizer. The charge pump includes a timing controller and a plurality of charge-pump circuits. The timing controller receives a reference signal to generate a plurality of enable signals having non-overlapping phases, where the frequency of each enable signal is equal to that of the reference signal divided by the number of the enable signals. The charge-pump circuits are coupled in parallel and operate in a time-interleaved manner according to the enable signals. In response to a first and second control signal, the charge-pump circuits are able to generate respective output currents which are multiplexed together to form a charge-pump current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93137161A TWI283968B (en) | 2004-12-02 | 2004-12-02 | Low noise charge pump for PLL-based frequence synthesis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93137161A TWI283968B (en) | 2004-12-02 | 2004-12-02 | Low noise charge pump for PLL-based frequence synthesis |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200620836A true TW200620836A (en) | 2006-06-16 |
TWI283968B TWI283968B (en) | 2007-07-11 |
Family
ID=39430931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW93137161A TWI283968B (en) | 2004-12-02 | 2004-12-02 | Low noise charge pump for PLL-based frequence synthesis |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI283968B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI415393B (en) * | 2007-01-30 | 2013-11-11 | Mosaid Technologies Inc | Phase shifting in dll/pll |
TWI415394B (en) * | 2010-04-13 | 2013-11-11 | Elite Semiconductor Esmt | Phase lock loop circuit and the method using the same |
TWI465034B (en) * | 2007-08-03 | 2014-12-11 | Wolfson Microelectronics Plc | Amplifier circuit and method of amplifying a signal in an amplifier circuit |
-
2004
- 2004-12-02 TW TW93137161A patent/TWI283968B/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI415393B (en) * | 2007-01-30 | 2013-11-11 | Mosaid Technologies Inc | Phase shifting in dll/pll |
TWI465034B (en) * | 2007-08-03 | 2014-12-11 | Wolfson Microelectronics Plc | Amplifier circuit and method of amplifying a signal in an amplifier circuit |
TWI415394B (en) * | 2010-04-13 | 2013-11-11 | Elite Semiconductor Esmt | Phase lock loop circuit and the method using the same |
Also Published As
Publication number | Publication date |
---|---|
TWI283968B (en) | 2007-07-11 |
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