COMPARATIVE STUDY OF ENCODERS FOR PARALLEL-TYPE ADCS |
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| Paula Pereira, Jorge R. Fernandes |
- Abstract:
- Analog-to-digital converters (ADCs) for high sampling frequencies have parallel-type architectures, where the output of the comparators is the so-called “thermometer code”. The digital part of such ADCs can be just an encoder from the thermometer code to binary code; however, different types of error correction can be implemented to enhance the ADC overall performance. In this paper we compare three different types of encoders: without error correction; with 1st order error correction; with nth order error correction. These encoders are compared with respect to the yield of the ADC with the different encoders, assuming the use of an identical analog part. The yield is defined by four different criteria: monotonicity, absence of missing codes, and either integral or differential nonlinearity below a specified value.
- Keywords:
- Analogue-to-digital converters, parallel ADCs, thermometer code-to-binary encoders, digital error correction
- Download:
- IMEKO-TC4-2001-098.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2001
- Title:
11th IMEKO TC4 Symposium on Trends in Electrical Measurements and Instrumentation (together with 6th IMEKO TC4 Workshop on ADC Modelling and Testing)
- Place:
- Lisbon, PORTUGAL
- Time:
- 13 September 2001 - 14 September 2001