Multiplexing channel switch selection circuit and control circuit and control method thereof

A control circuit of a multiplexing channel switch selection circuit, which is configured to operably control a channel switch circuit of the multiplexing channel switch selection circuit, wherein the multiplexing channel switch selection circuit, includes:

• a plurality of channel switch circuits, wherein the plurality of the channel switch circuits are coupled to a plurality of corresponding input ends and the plurality of the channel switch circuits are commonly coupled to an output end;
• and wherein each channel switch circuit further includes a switch unit having:
• a first switch and a second switch, wherein the first switch and the second switch are connected in series to a current route which lies between the corresponding input end and the output end, wherein in a situation when a channel selection signal selects the each channel switch circuit, the switch unit is configured to operably turn ON the first switch and the second switch based upon a shared gate voltage, so as to deliver an input voltage at the corresponding input end to the output end, so that the thus delivered input voltage becomes an output voltage at the output end, wherein a gate of the first switch and a gate of the second switch are commonly coupled to a shared gate end having the shared gate voltage thereat, and wherein a source of the first switch and a source of the second switch are commonly coupled to a shared source end having a shared source voltage thereat;
• the control circuit of the multiplexing channel switch selection circuit comprising:
• an analog bootstrap circuit coupled between the shared source end and the shared gate end, wherein in a situation when the channel selection signal selects the each channel switch circuit, the analog bootstrap circuit is configured to operably supply a conductive bias voltage across between the shared source end and the shared gate end, so as to turn ON the first switch and the second switch;
• and
• a feedback regulation circuit coupled to the analog bootstrap circuit, wherein the feedback regulation circuit is configured to operably feedback-regulate the shared gate voltage at a constant voltage level;
• wherein in the situation when the channel selection signal selects the each channel switch circuit and in a situation when the each channel switch circuit operates in a steady state, a current flowing through the current route is a zero current;
• wherein the shared gate voltage is equal to a sum of the shared source voltage plus the conductive bias voltage.

A control method of a multiplexing channel switch selection circuit, which is configured to operably control a channel switch circuit of the multiplexing channel switch selection circuit, wherein the multiplexing channel switch selection circuit, includes:

• a plurality of channel switch circuits, wherein the plurality of the channel switch circuits are coupled to a plurality of corresponding input ends and the plurality of the channel switch circuits are commonly coupled to an output end;
• and wherein each channel switch circuit further includes a switch unit having:
• a first switch and a second switch, wherein the first switch and the second switch are connected in series to a current route which lies between the corresponding input end and the output end, wherein in a situation when a channel selection signal selects the each channel switch circuit, the switch unit is configured to operably turn ON the first switch and the second switch based upon a shared gate voltage, so as to deliver an input voltage at the corresponding input end to the output end, so that the thus delivered input voltage becomes an output voltage at the output end, wherein a gate of the first switch and a gate of the second switch are commonly coupled to a shared gate end having the shared gate voltage thereat, and wherein a source of the first switch and a source of the second switch are commonly coupled to a shared source end having a shared source voltage thereat;
• the control method of the multiplexing channel switch selection circuit comprising following steps:
• in a situation when the channel selection signal selects the each channel switch circuit, supplying an conductive bias voltage across between the shared source end and the shared gate end, so as to turn ON the first switch and the second switch;
• and
• feedback-regulating the shared gate voltage at a constant voltage level;
• wherein in the situation when the channel selection signal selects the each channel switch circuit and in a situation when the each channel switch circuit operates in a steady state, a current flowing through the current route is a zero current;
• wherein the shared gate voltage is equal to a sum of shared the source voltage plus the conductive bias voltage.