| 摘要 |
A bipolar output charge pump circuit having a network of switching paths 110 for selectively connecting an input node (VV) and a reference node (VG) for connection to an input voltage, a first pair of output nodes (VP, VN), two pairs of flying capacitor nodes (CF1A, CF1B; CF2A, CF2B), and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors (CF1, CF2) connected to the two pairs of flying capacitor nodes, to provide a first mode and a second mode when in use with two flying capacitors connected to the flying capacitor nodes, wherein at least the first mode corresponds to a bipolar output voltage of +/−3VV, +/−VV/5 or +/−VV/6. |
| 主权项 |
1. A charge pump circuit operable to output a bipolar output voltage, comprising:
an input node and a reference node for connection to an input voltage; a first output node and a second output node arranged to output the bipolar output voltage; two pairs of flying capacitor nodes; a network of switching paths for interconnecting said nodes; and a controller operable to control the network of switching paths to selectively provide at least a first mode and a second mode when in use with two flying capacitors connected to the flying capacitor nodes by sequencing the network of switching paths through cycles of switching states, wherein the first mode corresponds to a bipolar output voltage of +/−2VV; and wherein the second mode corresponds to a bipolar output voltage of one of ±VV/2, ±VV/3, ±VV/4, ±VV/5 or ±VV/6 where VV is the input voltage. |
