Solid-state imaging apparatus and imaging apparatus

1. A solid-state imaging apparatus comprising:

comparing means for comparing a pixel signal obtained by a pixel section and a reference signal the value of which varies in a stepwise manner;

analog-digital converting means for outputting, as a digital value, the amount of time when the pixel signal and the reference signal change levels by the comparing means;

reset signal generating means for generating a pulse reset signal that triggers a reset operation of the comparing means in order to adjust the reference in the analog-digital converting means; and

waveform processing means provided between the reset signal generating means and a reset signal input of the comparing means for increasing the degree of dullness of a waveform of the reset signal, the increase in dullness meaning an increase in rise and fall times of the pulse reset signal.

2. The solid-state imaging apparatus according to claim 1 , wherein the comparing means is provided at each column of the pixel section.

3. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses the load of a capacitor.

4. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses the load of a resistance.

5. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses a CMOS inverter.

6. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses a CMOS inverter; and

the numbers of P-channel MOS and N-channel MOS included in the CMOS inverter differ.

7. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses a CMOS inverter; and

a switch for operation control is provided in either P-channel MOS or N-channel MOS included in the CMOS inverter.

8. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses a CMOS inverter; and

the CMOS inverter drives a direct current source.

9. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses the load of a wire provided between the reset signal generating means and the comparing means.

10. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means is configured to increase the load of a wire as the distance from the reset signal generating means decreases in a wiring path from the reset signal generating means to the comparing means.

11. The solid-state imaging apparatus according to claim 1 , wherein the comparing means is provided at each column of the pixel section; and

the lengths of the wiring paths from the reset signal generating means to the comparing means at the columns are equal.

12. The solid-state imaging apparatus according to claim 1 , wherein the waveform processing means uses a capacitor within the comparing means.

13. An imaging apparatus comprising:

comparing means for comparing a pixel signal obtained by a pixel section and a reference signal the value of which varies in a stepwise manner;

analog-digital converting means for outputting, as a digital value, the amount of time when the pixel signal and the reference signal change levels by the comparing means;

reset signal generating means for generating a pulse reset signal that triggers a reset operation of the comparing means in order to adjust the reference in the analog-digital converting means;

waveform processing means provided between the reset signal generating means and a reset signal input of the comparing means for increasing the degree of dullness of a waveform of the reset signal, the increase in dullness meaning an increase in rise and fall times of the pulse reset signal; and

control means for controlling at least the analog-digital converting means and the reset signal generating means.

14. A solid-state imaging apparatus comprising:

a comparing section comparing a pixel signal obtained by a pixel section and a reference signal the value of which varies in a stepwise manner;

an analog-digital converting section outputting, as a digital value, the amount of time when the pixel signal and the reference signal change levels by the comparing section;

a reset signal generating section generating a pulse reset signal that triggers a reset operation of the comparing section in order to adjust the reference in the analog-digital converting section; and

a waveform processing section provided between the reset signal generating section and a reset signal input of the comparing section, the waveform processing section increasing the degree of dullness of a waveform of the reset signal, the increase in dullness meaning an increase in rise and fall times of the pulse reset signal.

15. An imaging apparatus comprising:

a comparing section comparing a pixel signal obtained by a pixel section and a reference signal the value of which varies in a stepwise manner;

an analog-digital converting section outputting, as a digital value, the amount of time when the pixel signal and the reference signal change levels by the comparing section;

a reset signal generating section generating a pulse reset signal that triggers a reset operation of the comparing section in order to adjust the reference in the analog-digital converting section;

a waveform processing section provided between the reset signal generating section and a reset signal input of the comparing section, the waveform processing section increasing the degree of dullness of a waveform of the reset signal, the increase in dullness meaning an increase in rise and fall times of the pulse reset signal; and

a control section controlling at least the analog-digital converting section and the reset signal generating section.