Abstract: A main (sub) clock circuit comprising a first (second) capacitor, a first (second) current-supply circuit to supply to the first (second) capacitor a first (third) current for charging at a predetermined-current value or a second (fourth) current for discharging at a predetermined-current value, a first (second) charge/discharge-control circuit to output a first (second) control signal for switching between the first (third) current and second (fourth) current which are supplied to the first (second) capacitor from the first (second) current-supply circuit when a voltage across the first (second) capacitor has reached a first (third) reference voltage or second (fourth) reference voltage higher than the first (third) reference voltage, and a first (second) output circuit to output a main (sub) clock according to the first (second) control signal, the first capacitor having one end connected to a first potential, the second capacitor having one end to which the main clock is input.

Abstract: A triangle wave generating circuit comprising: a pulse generating circuit configured to generate a plurality of pulse signals with the same period and with phases different from one another; and a plurality of charge/discharge circuits configured to be supplied with the plurality of pulse signals, respectively, the plurality of charge/discharge circuits each including: a current supply circuit configured to supply to a capacitor a first current for charging at a predetermined current value or a second current for discharging at a predetermined current value; and a charge/discharge control circuit configured to switch between the first current and the second current when the pulse signals are supplied thereto and when a voltage across the capacitor reaches a predetermined reference voltage, the first current and the second current supplied from the current supply circuit to the capacitor.

Abstract: A triangle wave generating circuit comprising: a pulse generating circuit configured to generate a plurality of pulse signals with the same period and with phases different from one another; and a plurality of charge/discharge circuits configured to be supplied with the plurality of pulse signals, respectively, the plurality of charge/discharge circuits each including: a current supply circuit configured to supply to a capacitor a first current for charging at a predetermined current value or a second current for discharging at a predetermined current value; and a charge/discharge control circuit configured to switch between the first current and the second current when the pulse signals are supplied thereto and when a voltage across the capacitor reaches a predetermined reference voltage, the first current and the second current supplied from the current supply circuit to the capacitor.

Abstract: A main (sub) clock circuit comprising a first (second) capacitor, a first (second) current-supply circuit to supply to the first (second) capacitor a first (third) current for charging at a predetermined-current value or a second (fourth) current for discharging at a predetermined-current value, a first (second) charge/discharge-control circuit to output a first (second) control signal for switching between the first (third) current and second (fourth) current which are supplied to the first (second) capacitor from the first (second) current-supply circuit when a voltage across the first (second) capacitor has reached a first (third) reference voltage or second (fourth) reference voltage higher than the first (third) reference voltage, and a first (second) output circuit to output a main (sub) clock according to the first (second) control signal, the first capacitor having one end connected to a first potential, the second capacitor having one end to which the main clock is input.

Abstract: In a charge control circuit comprising a full charge detection voltage supply device supplying a predetermined full charge detection voltage for detecting a full charge status; and a comparator including a charge status voltage input unit to which is inputted a charge status voltage indicative of the charge status of a secondary battery and a full charge detection voltage input unit to which the full charge detection voltage is inputted, the comparator outputting a result of a comparison between the charge status voltage and the full charge detection voltage, the charge control circuit further comprises an external terminal connected to the full charge detection voltage input unit of the comparator and for adjusting the full charge detection voltage, with an electronic component for adjusting the full charge detection voltage being connectable to the external terminal.

Abstract: In a charge control circuit comprising a full charge detection voltage supply device supplying a predetermined full charge detection voltage for detecting a full charge status; and a comparator including a charge status voltage input unit to which is inputted a charge status voltage indicative of the charge status of a secondary battery and a full charge detection voltage input unit to which the full charge detection voltage is inputted, the comparator outputting a result of a comparison between the charge status voltage and the full charge detection voltage, the charge control circuit further comprises an external terminal connected to the full charge detection voltage input unit of the comparator and for adjusting the full charge detection voltage, with an electronic component for adjusting the full charge detection voltage being connectable to the external terminal.