Ramp generation circuit and A/D converter
First Claim
Patent Images
1. A ramp generation circuit comprising:
- a charge supply unit which generates predetermined charges every predetermined time;
an integration circuit which accumulates the charges generated from the charge supply unit and converts the charges into a voltage; and
an attenuation unit which outputs, to an output terminal, a voltage obtained by attenuating a noise value of an output voltage from the integration circuit, the attenuation unit can change one of an attenuation factor of the output voltage and a voltage value of the output voltage, and the attenuation unit comprises a variable voltage source whose one terminal is connected to a power supply.
1 Assignment
0 Petitions
Accused Products
Abstract
A ramp generation circuit including, a charge supply unit which generates predetermined charges every predetermined time, an integration circuit which accumulates the charges generated from the charge supply unit and converts the charges into a voltage, and, an attenuation unit which outputs, to an output terminal, a voltage obtained by attenuating a noise value of an output voltage from the integration circuit.
20 Citations
19 Claims
-
1. A ramp generation circuit comprising:
-
a charge supply unit which generates predetermined charges every predetermined time; an integration circuit which accumulates the charges generated from the charge supply unit and converts the charges into a voltage; and an attenuation unit which outputs, to an output terminal, a voltage obtained by attenuating a noise value of an output voltage from the integration circuit, the attenuation unit can change one of an attenuation factor of the output voltage and a voltage value of the output voltage, and the attenuation unit comprises a variable voltage source whose one terminal is connected to a power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An A/D converter comprising:
-
a ramp generation unit including a charge supply unit which generates predetermined charges every predetermined time, an integration circuit which accumulates the charges generated from the charge supply unit and converts the charges into a voltage, and an attenuation unit which outputs, to an output terminal, a voltage obtained by attenuating a noise value of an output voltage from the integration circuit; and a converter unit configured to receive an output voltage from the ramp generation unit as a reference voltage and output a digital signal, the converter unit comprising a comparison unit which outputs the digital signal, the comparison unit having a negative input terminal connected to the input signal holding unit and a positive input terminal that receives the reference voltage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification