| 摘要 |
Transconveyance amplifiers, and more specifically charge transfer amplifiers, are included in analog-to-digital converters. Transconveyance amplifiers are used in averaging and interpolation circuits that facilitate converting an analog signal into a meaningful digital representation of the analog signal. Due to the characteristics of charge transfer amplifiers power dissipation in averaging and interpolation circuits is significantly reduced. Coupling capacitors associated with charge transfer amplifiers are utilized as analog sample and hold circuits for holding an analog signal while fine reference voltages settle. Thus, the need for separate sample and hold circuits is eliminated. A novel timing scheme allows an increased number of clock partitions for fine reference voltages to settle, thus providing for increased operational frequency. Residual charge imbalances at the input terminals of a latch are reduced in a manner that does not affect charge transfer amplifiers that are coupled to the latch during an amplify phase.
|
