Latch-type charge pump
According to various aspects, a latch-type charge pump may include: an input node and an output node; a first charge storage and a second charge storage coupled in parallel to each other, a first switch coupled to the input node and a second switch coupled to the output node, wherein the first charge storage couples the first switch with the second switch; and a control circuit configured to control the first switch based on a state of the second charge storage, and to control the second switch based on a state of the first charge storage.
1. A latch-type charge pump, comprising:
an input node and an output node;
a first charge storage and a second charge storage coupled in parallel to each other between the input node and the output node,
a first switch coupled to the input node and a second switch coupled to the output node, wherein the first charge storage couples the first switch with the second switch; and
a control circuit configured to control the first switch based on a state of the second charge storage, and to control the second switch based on a state of the first charge storage, wherein the control circuit comprises a diode-connected field-effect transistor.
2. The latch-type charge pump of claim 1 , wherein the control circuit is configured to supply a control signal based on the state of the first charge storage to a control node of the second switch.
3. The latch-type charge pump of claim 2 , wherein the second switch comprises a field-effect transistor and wherein the control node is a gate terminal of the field-effect transistor.
4. The latch-type charge pump of claim 1 , wherein the control circuit:
comprises a controller node; and
is configured to control the second switch further based on a signal capacitively supplied to the controller node.
5. The latch-type charge pump of claim 1 , wherein the diode-connected field-effect transistor couples the first charge storage with the second switch.
6. The latch-type charge pump of claim 5 , wherein a control node of the diode-connected field-effect transistor is coupled to a control node of the second switch.
7. The latch-type charge pump of claim 5 , wherein a control node of the diode-connected field-effect transistor is coupled to the first charge storage.
8. The latch-type charge pump of claim 1 , wherein the first switch includes a first field-effect transistor; and wherein the second switch includes a second field-effect transistor; wherein the first field-effect transistor and the second field-effect transistor are of a same channel doping type.
9. The latch-type charge pump of claim 8 , wherein the charge pump is configured such that, when supplied with a supply voltage, each field-effect transistor of the charge pump is stressed to a maximum voltage that is equal to the supply voltage or less than the supply voltage.
10. The latch-type charge pump of claim 1 , further comprising:
a further first switch coupled to the input node and a further second switch coupled to the output node, wherein the second charge storage couples the further first switch with the further second switch; and
wherein the control circuit is configured to control the further first switch based on a state of the first charge storage, and to supply a signal to a control terminal of the further second switch based on a state of the second charge storage.
11. The latch-type charge pump of claim 1 , which has no parasitic bipolar effect.
12. A latch-type charge pump, comprising:
an input node and an output node;
a first charge storage and a second charge storage coupled in parallel to each other between the input node and the output node,
a first field-effect transistor coupled to the input node and a second field-effect transistor coupled to the output node, wherein the first charge storage couples the first field-effect transistor with the second field-effect transistor; and
wherein the first field-effect transistor and the second field-effect transistor are of a same type of channel doping;
a control circuit comprising one or more control transistors coupling the first charge storage to the second field-effect transistor and being of the same type of channel doping, wherein the one or more control transistors comprises one or more diode-connected field-effect transistors.
13. The latch-type charge pump of claim 12 ,
the control circuit configured to:
supply a first control signal based on a state of the first charge storage to a gate of the second field-effect transistor; and/or
supply a second control signal based on a state of the second charge storage to a gate of the first field-effect transistor.
14. The latch-type charge pump of claim 12 , further comprising:
a further first field-effect transistor coupled to the input node and a further second field-effect transistor coupled to the output node, wherein the second charge storage couples the further first field-effect transistor with the further second field-effect transistor; and
wherein the control circuit is configured to supply a further first signal to a gate of the further second field-effect transistor based on a state of the second charge storage and to supply a further second control signal based on a state of the first charge storage to a gate of the further first field-effect transistor;
wherein the further first field-effect transistor and the further second field-effect transistor are of the same type of channel doping.
15. The latch-type charge pump of claim 12 ,
wherein a gate of the one or more control transistors is coupled to a gate of the second field-effect transistor; or
wherein a gate of the one or more control transistors is coupled to the first charge storage.
16. The latch-type charge pump of claim 12 , wherein the first field-effect transistor and the second field-effect transistor are configured to suppress a parasitic current through the respective field-effect transistor into a substrate.
17. The latch-type charge pump of claim 12 , wherein the first field-effect transistor is a first triple well device and the second field-effect transistor is a second triple well device.
18. A latch-type charge pump, comprising:
an input node and an output node;
a latch structure comprising a pair of first switches coupled to each other by the input node;
a pair of second switches coupled to each other by the output node, each second switch coupling the latch structure with the output node,
a control circuit configured to control the pair of second switches in push-pull configuration and independently from the latch structure, wherein the control circuit comprises a pair of diode-connected field-effect transistors.
19. The latch-type charge pump of claim 18 , wherein each switch of the pair of first switches includes a first field-effect transistor; and wherein each switch of the pair of second switches includes a second field-effect transistor; wherein the first field-effect transistor and the second field-effect transistor are of a same type of channel doping.
20. The latch-type charge pump of claim 18 , wherein each switch of the pair of first switches is a first triple well device and wherein each switch of the pair of second switches is a second triple well device.