As seen in FIG. 6, the gates of transistors 622 and 630 receive the timing control signal R2ACF. When the timing signal R2ACF is high, transistor 622 is OFF to isolate the PH signal line from the high voltage source (e.g., Vccp2) and the transistor 630 is ON to pull down the PH signal line to the value of the low voltage source Vnwl (or, e.g., Vss or another low voltage source) via the stabilization circuit 625. As discussed above, the stabilization circuit 625 can include two continuously gated transistors 626 and 628 that are connected in series. The continuously gated transistors 626 and 628 are connected between the PH signal line and the drains of transistors 630 and 632. Because transistors 626 and 628 are always ON, the voltage PH signal line is pulled down to Vnwl (or, e.g., Vss or another low voltage source) when the transistor 630 or the transistor 632 is ON. The gate of transistor 626 can be connected to a high voltage source that can provide a voltage in a range of 1.5 volts to 4.7 volts (e.g., Vccp2, Vccp, Vcc or another high voltage source) and the gate of transistor 628 is connected to a high voltage source that can provide a voltage in a range of 1.5 volts to 4.7 volts (e.g., Vccp2, Vccp, Vcc or another high voltage source). In some embodiments, the gate of transistor 626 is connected to a voltage source that is at a higher voltage than the gate of transistor 628. For example, the gate of transistor 626 can be connected to Vccp2 and the gate of transistor 628 can be connected to Vccp or Vcc. In some embodiments, the gate of transistor 628 is connected to a voltage source that is at a higher voltage (e.g., Vccp2) than the gate of transistor 626 (e.g., Vccp, Vcc). In some embodiments, the gate of transistor 626 is connected to a voltage source that is at a same voltage level as that of the gate of transistor 628. The NMOS transistors 626 and 628 provide more reliability to FXD 600 circuit by providing a resistive path for the leakage current going through transistor 630 and/or transistor 632 to create a voltage drop in the leakage current path when one or both transistors 630 and 632 are OFF.