SAMPLE-AND-HOLD APPARATUS AND OPERATING METHOD THEREOF

• Main Authors: CHENG CHIU-HUNG, HSIEH CHIH-YUAN, YEN CHIH-JEN
• Format: Patent
• Language: English
• Published: 04.09.2008
• Subjects: INFORMATION STORAGE; PHYSICS; STATIC STORES

A sample-and-hold apparatus and an operating method thereof are provided. The sample-and-hold apparatus includes a sampling amplifier, a transistor, a first switch, a second switch, a sampling capacitor, and a drain-charge unit. A first input terminal of the sampling amplifier receives an input signal. A first-terminal of the transistor is coupled to a first voltage. The first switch is coupled between an output terminal of the sampling amplifier and a gate of the transistor. The first and second terminals of the second switch are coupled to a second terminal of the transistor and a second input terminal of the sampling amplifier, respectively. The first and second terminals of the sampling capacitor are coupled to the gate of the transistor and a reference voltage. The drain-charge unit for draining/providing charges has first and second terminals coupled to the second terminal of the second switch and a second voltage, respectively.