Charge-recycling circuits including switching power stages with floating rails

摘要

In one embodiment, a circuit comprises a first switching transistor and a second switching transistor. The first switching transistor and the second switching transistor are coupled in series between an input voltage and ground and having a common node therebetween to provide a switching output. A first switching circuit selective couples a gate of the first switching transistor to the input voltage and a first mid-level voltage supply. A second switching circuit selectively couples a gate of the second switching transistor to a second mid-level voltage supply and ground. A charge-recycling circuit is coupled to the gate of the first switching transistor, the gate of the second switching transistor, the first mid-level voltage supply, and the second mid-level voltage supply to selectively recycle charge between the first mid-level voltage supply and the second mid-level voltage supply.

主权项

1. A circuit comprising:
a first switching transistor; a second switching transistor, the first switching transistor and the second switching transistor coupled in series between an input voltage and ground and having a common node therebetween to provide a switching output;
a first switching circuit to selectively couple a gate of the first switching transistor to the input voltage and a first mid-level voltage supply;a second switching circuit to selectively couple a gate of the second switching transistor to a second mid-level voltage supply and ground; anda charge-recycling circuit coupled to the gate of the first switching transistor, the gate of the second switching transistor, the first mid-level voltage supply, and the second mid-level voltage supply to selectively recycle charge between the first mid-level voltage supply and the second mid-level voltage supply.