378 A 1 . 5 V , 30 Msps , 9 - to 10 - bit equivalent Current - mode CMOS Sample - and - hold Circuit
نویسنده
چکیده
A new video-speed, current-mode, CMOS, sample-andhold circuit haF been developed. It operates with a supply voltage as low as 1.5 V and a signal-to-noise ratio (SIN) of 57 dB and 54 dB at clock frequencies of 20 MHz and 30 MHz. It consists of current mirror circuits with an analog switch and a capacitor placed in differential fonn to achieve high accuracy without being affected by the switch feed-through error. Voltages at the input and the output terminals of the current mirror circuit are kept constant to obtain precise current matching. The circuit was fabricated using 0.6 , LL m MOS devices with normal threshold voltages (Vth) of +O 7 V (NMOS) and -0.7 V (PMOS).
منابع مشابه
A current-mode, 3 V, 20 MHz, 9-bit equivalent CMOS sample-and-hold circuit
| A new current-mode, low-power, lowvoltage and high-speed CMOS sample-and-hold circuit has been designed and fabricated. A new currentmode di erential switching scheme has been adopted to eliminate errors caused by feedthrough injection from the sample switches. The experimental result yields 9-bit resolution in 9mW power dissipation, in a 20MHz clock frequency from a 3V power supply.
متن کاملA Current-Mode Circuit With a Linearized Input V/I Conversion Scheme and the Realization of a 2-V/2.5-V Operational, 100-MS/s, MOS SHA
This paper proposes a circuit to linearize the signal current and improve the distortion characteristics at the input of a current-mode circuit. Input voltage-to-current (V/I) conversion is carried out by a resistor that connects the signal source and the current input terminal of the current-mode circuit. The signal current flowing into the current-mode circuit through this resistor is distort...
متن کاملLow-Power Circuit Techniques for Low-Voltage Pipelined ADCs Based on Switched-Opamp Architecture
This paper proposes useful circuit structures for achieving a low-voltage/low-power pipelined ADC based on switched-opamp architecture. First, a novel unity-feedback-factor sample-and-hold which manipulates the features of switched-opamp technique is presented. Second, opamp-sharing is merged into switched-opamp structure with a proposed dual-output opamp configuration. A 0.8-V, 9-bit, 10-Msamp...
متن کامل14-bit, 125-MSPS ADS5500 evaluation
Introduction The ADS5500 is a high-speed, pipeline, CMOS ADC with 14-bit resolution and a 125-MSPS sampling rate. In March 2004 Texas Instruments (TI) introduced the device, which is the first ADC in the world market with such high sampling speed and high resolution. The ADS5500 is suitable for applications such as wireless communication, test and measurement instrumentation, control systems, m...
متن کاملA L6V IO-bit 2OMHz Current-mode Sample and Hold Circuit
A current mode sample and hold circuit has been designed to examine if high-precision current processing is possible simultaneously with a circu it to which current mode and switched-current circuits are applied and which operates at high-speed and with low supply voltage. The results are 1 O-bit accuracy, a 20MHz clock, and a 2 V supply voltage. Clock feedthroug h which degrades the precision ...
متن کامل