Signal processing apparatus

A signal processing apparatus comprising:

• variable capacitor means of which capacity varies with a physical amount;
• a C-V conversion circuit for converting variation in said capacity into a voltage signal;
• first and second charge holding means for holding said voltage signal at different timings as first and second charges, respectively;
• offset compensating charge holding means for generating holding an offset charge for compensation of an offset in said voltage signal;
• and
• charge combining and holding means for combining and holding said first and second charges and said offset charge as the combined charge and converting the combined charge into an output voltage signal indicative of said physical amount.

A signal processing apparatus comprising:

• variable capacitor means of which capacity varies with a physical amount;
• a C-V conversion circuit for converting variation in said capacity into a voltage signal;
• first and second charge holding means for holding said voltage signal at different timings as first and second charges, respectively;
• charge combining and holding means for combining and holding said first and second amounts of charges;
• and
• outputting means for receiving the combined charge and outputting an output voltage signal in accordance with the received charge corresponding to said physical amount.

A signal processing apparatus comprising:

• variable capacitor means of which capacity varies with a physical amount;
• a C-V conversion circuit for converting variation in said capacity into a voltage signal;
• first and second charge holding means for holding said voltage signal at different timings as first and second charges, respectively;
• and
• charge combining and holding means for combining and holding said first and second charges and converting a combined charge into an output voltage signal corresponding to said physical amount.

A signal processing apparatus comprising:

• first and second charge holding means for holding an input signal as first and second charges at different timings, respectively;
• offset compensating charge holding means for generating and holding an offset charge;
• charge combining and holding means for combining and holding said first and second charges and said offset charge;
• and
• outputting means for receiving the combined charge and outputting a voltage corresponding to said input signal in accordance with the received charge.

A signal processing apparatus comprising:

• first and second charge holding means for holding an input signal at different timings as first and second charges, respectively;
• offset compensating charge holding means for generating and holding an offset charge;
• and
• charge combining and holding means for combining and holding said first and second charges and said offset charge as a combined charge and converting said combined charge into an output voltage corresponding to said input signal.

A signal processing apparatus comprising:

• first and second charge holding means for holding an input signal as first and second charges at different timings, respectively;
• charge combining and holding means for combining and holding said first and second charges;
• and
• outputting means for receiving the combined charge and outputting a voltage corresponding to said input signal in accordance with the received charge.

A signal processing apparatus comprising:

• variable capacitor means of which capacity varies with a physical amount;
• a C-V conversion circuit for converting variation in said capacity into a voltage signal;
• at least a charge holding means for holding said voltage signal as a charge;
• offset compensating charge holding means for generating and holding an offset charge for compensation of an offset in said voltage signal;
• outputting means for combining and converting said charge and said offset charge to output a voltage signal corresponding to said physical amount.