| 摘要 |
<p>A voltage coupling circuit for use in a digital-to-time converter insures that converter operation is stabilized against temperature and power supply variations. The digital-to-time converter operates by comparing a ramp voltage to a threshold voltage that is set in accordance with an input digital word. The voltage coupling circuit, which causes the ramp voltage to track changes in the threshold voltage, includes a current mirror arrangement that separates the voltage coupling and ramp generation functions. As a result, transistor base currents are not drawn through the ramp capacitor, and accuracy is improved in the case of long time delays.</p> |
