A 700-MHz switched-capacitor analog waveform sampling circuit
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., CA (United States). Center for Integrated Systems
Analog switched-capacitor memory circuits are suitable for use in a wide range of applications where analog waveforms must be captured or delayed, such as the recording of pulse echo events and pulse shapes. Analog sampling systems based on switched-capacitor techniques offer performance superior to that of flash A/D converters and charge-coupled devices with respect to cost, density, dynamic range, sampling speed, and power consumption. This paper proposes an architecture with which sampling frequencies of several hundred megahertz can be achieved using conventional CMOS technology. Issues concerning the design and implementation of an analog memory circuit based on the proposed architecture are presented. An experimental two-channel memory with 32 sampling cells in each channel has been integrated in a 2-[mu]m CMOS technology with poly-to-poly capacitors. The measured nonlinearity of this prototype is 0.03% for a 2.5 V input range, and the memory cell gain matching is 0.01% rms. The dynamic range of the memory exceeds 12 b for a sampling frequency of 700 MHz. The power dissipation for one channel operated from a single +5 V supply is 2 mW.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 7235081
- Report Number(s):
- SLAC-PUB--6414
- Journal Information:
- IEEE Journal of Solid-State Circuits, Journal Name: IEEE Journal of Solid-State Circuits Journal Issue: 4 Vol. 29; ISSN 0018-9200
- Publisher:
- IEEE
- Country of Publication:
- United States
- Language:
- English
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47 OTHER INSTRUMENTATION
ANALOG SYSTEMS
DATA ACQUISITION SYSTEMS
DESIGN
ELECTRONIC CIRCUITS
ENERGY LOSSES
INTEGRATED CIRCUITS
LOSSES
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
PERFORMANCE
POWER LOSSES
RECORDING SYSTEMS