发明名称 |
INTEGRATED CIRCUIT PHASE-LOCKED LOOP CHARGE PUMP |
摘要 |
A charge pump (2) is supplied to reset in rated conditions the error signal of a phase-locked loop of the type whereby a phase detector (1) periodically supplies this pump (2) with a first and second impulse having emission instants dependent on the phase ratio between phase-locked loop input signals and are allocated to control circuit output increase or decrease respectively by means of ring filter (3a, 3b). The pump features loops (21, 22, 23, 24, 28) to transform the first and second impulse into a first and second voltage signal of longer duration than maximum impulse duration and featuring values the difference of which depends on the phase ratio between the loop input signals and to generate a signal in a current representative of such difference.
|
申请公布号 |
CA2312349(A1) |
申请公布日期 |
2000.12.22 |
申请号 |
CA20002312349 |
申请日期 |
2000.06.21 |
申请人 |
CSELT - CENTRO STUDI E LABORATORI TELECOMUNICAZIONI S.P.A. |
发明人 |
BALISTRERI, EMANUELE;BURZIO, MARCO |
分类号 |
H03L7/093;H03L7/089;(IPC1-7):H03L7/085 |
主分类号 |
H03L7/093 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|