公开(公告)号：EP3965292A1

公开(公告)日：2022-03-09

申请号：EP21187346.8

申请日：2021-07-23

申请人： RichWave Technology Corp.

发明人： Yeh, Chia-Jung ,  Peng, Tien-Yun ,  Chen, Chih-Sheng

IPC分类号： H03F1/02 ,  H03F3/195 ,  H03F3/24 ,  G05F1/46 ,  H02M1/00 ,  H02M3/02

摘要： A voltage controlled circuit includes a tracking circuit (10), an operational amplifier (12), a transistor, a feedback circuit (17) and a sample and hold circuit (14). The tracking circuit (10) generates an updated enabling voltage (V'set) according to an enabling voltage (Vset), a sample enabling voltage (Vset max) and a sample reference voltage (Vclamp). The operational amplifier (12) output a control voltage according to an input voltage (V1) and a feedback voltage (V2). The transistor includes a control terminal receiving the control voltage, a first terminal receiving a reference voltage (VBAT), and a second terminal outputting a regulated voltage (Vreg). The feedback circuit (17) generates the feedback voltage (V2) according to the regulated voltage (Vreg). The sample and hold circuit (14) samples the input voltage (V1) to generate the sample enabling voltage (Vset_max), and samples the feedback voltage (V2) to generate the sample reference voltage (Vclamp).