Consider the circuit shown with an ideal long channel nMOSFET (enhancement-mode, the substrate is connected to the source). The transistor is appropriately biased in the saturation region with VGG and VDD such that it acts as a linear amplifier. vi is the small-signal ac input voltage. vA and vB represent the small-signal voltages at nodes A and B, respectively. The value of \(\dfrac{v_A}{v_B} \space \),is ________ (rounded off to one decimal place).
Enter numerical value using the virtual keypad. Round off where necessary.