A low power Charge Steering Based Frequency Divider

A 1.2 V high‐speed low‐power preamplifier latch‐based comparator

“…The output node capacitors (C D ) of the preamplifier are fully charged to the supply voltage VDD during this operation, and subsequently they are entirely drained to ground, using 2 × C D × VDD 2 of energy for each comparison. The tail current source in this paper's charge steering mode [6,7] preamplifier is a partial charge for conversion rather than a constant current in Figure 1b. The clock of clkB is high during the reset phase, capacitor C T begins to charge, and transistor MN3 is turned off.…”