Graphene’s ultra-high carrier mobility ( \(200,000cm^2/Vs\) on hBN)  makes it promising for high speed applications; however the absence of a band-gap makes it hard to design logic elements out of graphene. It is possible to open a bandgap in graphene by applying strain  or by confining it in one direction into nanoribbons , but in the process bandstructure gets distorted near Dirac point and the carrier mobility decreases . A recent set of papers have exploited instead the angle dependent transmission across graphene pn junctions (GPNJ) [5-9]. Since the opening angle is gate tunable, a sequence of angled junctions can turn off the electrons [10,11] using gateable momentum filtering in the absence of a band-gap (instead, the ideas use a transmission gap). In the absence of edge scattering, momentum filtering is predicted to give large ON, low OFF current and a steep subthreshold swing (SS). In this paper, we calculate the transfer (ID–VG) and output (ID–VD) characteristics of a GPNJ switch  and show current saturation using gate geometry alone.