Semiconductor device, signal processing system using the same, and calculation method therefor

A calculation method using a semiconductor device comprising:

• a plurality of input terminals;
• first and second capacitors each having a respective first terminal and a respective second terminal, said first terminals of said first and second capacitors being connected respectively to said plurality of input terminals, said second terminals of said first and second capacitors being directly connected in common to a common sense amplifier, wherein said first terminal of said first capacitor inputs a signal to be processed, and said first terminal of said second capacitor inputs a reference signal;
• switch means for resetting to a desired voltage a terminal of said sense amplifier connected to said second terminals of said first and second capacitors;
• and
• an analog signal processing circuit provided between at least one of said plurality of input terminals and the first terminal of the first capacitor corresponding to said at least one of said plurality of input terminals,
• wherein a potential of said first capacitor connected to said analog signal processing circuit, during a reset period, has no correlation to a potential thereat during a sensing period, and said sense amplifier produces an output according to a relation of a difference between the potential during the reset period and the potential during the sensing period to a potential of a signal for a reference.

A calculation method for a semiconductor device comprising:

• a plurality of input terminals;
• first and second capacitors each having a respective first terminal and a respective second terminal, said first terminals of said first and second capacitors being connected respectively to said plurality of input terminals, said second terminals of said first and second capacitors being directly connected in common to a common sense amplifier, wherein said first terminal of said first capacitor inputs a signal to be processed, and said first terminal of said second capacitor inputs a reference signal;
• switch means for resetting to a desired voltage a terminal of said sense amplifier connected to said second terminals of said first and second capacitors, wherein at least two of said plural input terminals and the first terminal corresponding to at least two of said plural input terminals are connected via a second switch means;
• and
• at least one analog signal processing circuit provided between at least one of said plurality of input terminals and the first terminal of the first capacitor corresponding to said at least one of said plurality of input terminals,
• wherein at least one of the input terminals is connected to the first capacitor via an additional switch, and
• wherein said additional switch connected to the commonly connected capacitors has an ON state period during a reset period of the commonly connected electrodes of the capacitors, at least one additional switch connected to the commonly connected capacitors is set in an ON state after said switch is set in an OFF state and the reset period ends, and a potential at the input side of the first capacitor during the reset period has no correlation to a potential thereat during a sensing period, and said sense amplifier produces an output according to a relation of a difference between the potentials of the input signal during the reset period and the sensing period.

A semiconductor device, comprising:

• a plurality of input terminals;
• first and second capacitors each having a respective first terminal and a respective second terminal, said second terminals of said first and second capacitors being directly connected in common to an inverter constituting a common sense amplifier;
• switch means for resetting to a desired voltage of terminal of said inverter of said sense amplifier connected to the second terminals of said first and second capacitors;
• and
• an analog signal processing circuit provided between at least one of said plurality of input terminals and the first terminal of the first capacitor corresponding to said at least one of said plurality of input terminals,
• wherein, corresponding to the first terminal of said second capacitor, at least one of said plurality of input terminals inputs a reference potential.

A semiconductor device comprising:

• a plurality of input terminals;
• first and second capacitors having first terminals and second terminals corresponding to the first terminals, wherein said capacitors are divided into at least two groups, each of said groups including at least one first capacitor and at least one second capacitor, and in each of said groups, the first terminals of said first and second capacitors are connected to the plurality of input terminals, and said second terminals of said first and second capacitors are directly connected commonly to a common sense amplifier;
• switch means for resetting to a desired voltage a terminal of said sense amplifier connected to the second terminals of said first and second capacitors, said sense amplifier being provided correspondingly to each of said groups;
• and
• analog signal processing circuit provided, in each of said groups, between at least one of said plural input terminals and the first terminal of said first capacitor corresponding to said at least one of said plural input terminals.