Patent ID: 8536850
Filing Date: 2013-09-17
Classification: H02M

Abstract:
1. A high side controller capable of sensing input voltage and output voltage of a power conversion circuit, comprising: a first switch, having a control end and two channel ends, said control end being coupled to a gate signal, and one of said two channel ends being coupled to a voltage signal; an inverting amplification circuit, having an input end coupled to the other one of said two channel ends, and an output end for providing a first processed voltage; a first sample and hold circuit, having a control input end coupled to said gate signal, an input end coupled to said first processed voltage, and an output end for providing a first sample voltage; a second switch, having a control end and two channel ends, said control end of said second switch being coupled to a complementary version of said gate signal, and one of said two channel ends of said second switch being coupled to said voltage signal; a voltage divider, coupled to the other one of said two channel ends of said second switch to provide a second processed voltage; and a second sample and hold circuit, having a control input end coupled to said complementary version of said gate signal, an input end coupled to said second processed voltage, and an output end for providing a second sample voltage; wherein said voltage signal is proportional to a negative version of said input voltage when said gate signal is active, and proportional to said output voltage when said gate signal is inactive.