Patent ID: 7180275

Claim:
A DC-DC high frequency boost converter, comprising: a supply voltage input ( 110 ): a boosted voltage output ( 112 ); a series circuit of an inductor ( 114 ) and a rectifying device ( 116 ) connected in series between said supply voltage input ( 110 ) and said boosted voltage output ( 112 ); a switch ( 124 ) connected between a connection node ( 120 ) of said inductor ( 114 ) and said rectifying device ( 116 ) and ground; a control circuit ( 126 ) for controlling said switch ( 124 ); and a zero inductor current detection circuit ( 128 ) that compares a voltage (On) on said connection node ( 120 ) with a reference voltage (U ref ) and provides a zero inductor current indication (Comp) when both voltages are equal; wherein the zero current detection circuit ( 128 ) comprises a comparator ( 132 ) with a first input connected to said connection node ( 120 ) trough a sampling switch ( 146 ), a second input connected to a reference voltage source ( 134 ) and an output connected to a control input of said control circuit ( 126 ).