Switched capacitor circuits

1. A switched capacitor circuit, comprising:

an integrator;

a summing junction switch connected to said integrator;

a sampling capacitor connected to said summing junction switch;

a signal conducting MOSFET switch connected to said sampling capacitor; and

a replica network that controls a resistance of said signal conducting MOSFET switch in response to variations in an input signal voltage received at said signal conducting MOSFET switch, said replica network connected to a gate terminal of said signal conducting MOSFET switch.

2. The switched capacitor circuit of claim 1 , wherein said integrator is a differential integrator and said summing junction switch is connected to an inverting terminal of said differential integrator.

3. The switched capacitor circuit of claim 2 , further comprising:

a second summing junction switch connected to a noninverting terminal of said differential integrator;

a second sampling capacitor connected to said second summing junction switch;

a second signal conducting MOSFET switch connected to said second sampling capacitor; and

a second replica network that controls the resistance of said second signal conducting MOSFET switch in response to variations in a second input signal voltage received at said second signal conducting MOSFET switch, said second replica network connected to a gate terminal of said second signal conducting MOSFET switch.

4. A switched capacitor circuit, comprising:

an integrator;

a first switch connected to said integrator;

a first capacitor connected to said first switch;

a first field effect transistor connected to said first capacitor; and

a first network configured to control a resistance of said first field effect transistor in response to variations in a first input signal voltage received at said first field effect transistor, said first network connected to a gate terminal of said first field effect transistor.

5. The switched capacitor circuit of claim 4 , wherein said first network comprises:

a bridge circuit, wherein a second field effect transistor is disposed in a resistor branch of said bridge circuit; and

an operational amplifier, wherein a noninverting terminal of said operational amplifier is connected to a first node of said bridge circuit, an inverting terminal of said operational amplifier is connected to a second node of said bridge circuit, said second node is separated from said first node by a third node of said bridge circuit, an output of said operational amplifier is connected to a gate terminal of said second field effect transistor and to said gate terminal of said first field effect transistor.

6. The switched capacitor circuit of claim 5 , further comprising a second capacitor connected in parallel between said output of said operational amplifier and said second node.

7. The switched capacitor circuit of claim 6 , further comprising a second switch coupled between said output of said operational amplifier and said gate terminal of said first field effect transistor.

8. The switched capacitor circuit of claim 7 , further comprising a third switch coupled between a fourth node and a ground, wherein said fourth node is positioned between said second switch and said gate terminal of said first field effect transistor.

9. The switched capacitor circuit of claim 4 , wherein said integrator is a differential integrator.

10. The switched capacitor circuit of claim 9 , wherein said differential integrator comprises:

an operational amplifier;

a second capacitor coupled to an inverting terminal of said operational amplifier; and

a third capacitor coupled to a noninverting terminal of said operational amplifier.

11. The switched capacitor circuit of claim 10 , wherein said first switch is connected to said inverting terminal.

12. The switched capacitor circuit of claim 10 , further comprising:

a second switch connected to said noninverting terminal.

13. The switched capacitor circuit of claim 12 , further comprising:

a fourth capacitor connected to said second switch.

14. The switched capacitor circuit of claim 13 , further comprising:

a second field effect transistor connected to said fourth capacitor.

15. The switched capacitor circuit of claim 14 , further comprising:

a second network configured to control a resistance of said second field effect transistor in response to variations in a second input signal voltage received at said second field effect transistor, said second network connected to a gate terminal of said second field effect transistor.

16. The switched capacitor circuit of claim 15 , wherein said second network comprises:

a bridge circuit, wherein a third field effect transistor is disposed in a resistor branch of said bridge circuit; and

a second operational amplifier, wherein a noninverting terminal of said second operational amplifier is connected to a first node of said bridge circuit, an inverting terminal of said second operational amplifier is connected to a second node of said bridge circuit, said second node is separated from said first node by a third node of said bridge circuit, an output of said second operational amplifier is connected to a gate terminal of said third field effect transistor and to said gate terminal of said second field effect transistor.

17. The switched capacitor circuit of claim 16 , further comprising a fifth capacitor connected in parallel between said output of said second operational amplifier and said second node.

18. The switched capacitor circuit of claim 17 , further comprising a third switch coupled between said output of said second operational amplifier and said gate terminal of said second field effect transistor.

19. The switched capacitor circuit of claim 18 , further comprising a fourth switch coupled between a fourth node and a ground, wherein said fourth node is positioned between said third switch and said gate terminal of said second field effect transistor.