One-bit switched-capacitor D/A circuit with continuous time line

Details One-bit switched-capacitor D/A circuit with continuous time line One-bit switched-capacitor D/A circuit with continuous time line

1993-06-16

1994-12-27

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341144, H03M 166

Patent

active

053769368

ABSTRACT:
A modified lossy integrator digital-to-analog converter includes an amplifier (46) that receives an input on a summing node (48) and provides an output on a node (52). A feedback capacitor (50) is disposed across the input and output and has an output switched-capacitor (54) disposed in parallel therewith to passively distribute the charge thereacross. Switches (60) and (66) are operable to control the switching operation of the capacitor (54). Two input switched capacitors (70) and (94) are controlled by associated switches to switch charge onto the summing node (48) in a first clock cycle .phi..sub.2. A one-bit data stream modulates the operation such that either the charge from the capacitor (78) is dumped onto the summing node (48) or the charge from the capacitor (94) is dumped onto the summing node (48). This operation during the .phi..sub.2 cycle provides an integrated output that is slew-limited. The full charge of the selected capacitor (78) or (94) is allowed to be completely dumped onto the node (48) prior to the output switched capacitor (54) being disposed across the feedback capacitor (50). This allows for a linear operation in this range. Thereafter, the charge is passively distributed across the feedback capacitor (50) in a linear fashion associated with the lossy integrator. This provides a conversion from a digital signal one-bit data stream to a continuous time output analog signal.

REFERENCES:
patent: 4521762 (1985-06-01), Kapral
patent: 4698596 (1987-10-01), Haigh et al.
patent: 4918454 (1990-04-01), Early et al.

Affiliated with

Also associated with

Rating

One-bit switched-capacitor D/A circuit with continuous time line does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with One-bit switched-capacitor D/A circuit with continuous time line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and One-bit switched-capacitor D/A circuit with continuous time line will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-921692