Two phase photo interrupter - Application

I have some two-phase photo interrupters I intend to use in a project and am having difficulty figuring out how to hook them up and use each phase independently. In case you are wondering, the obvious use for a two-phase interrupter is rotation speed & direction.

The issue is that the two photo-transistors in the interrupter use a common Collector, with two separate Emitters.

http://media.digikey.com/pdf/Data%20Sheets/Sharp%20PDFs/GP1S39J0000F.pdf

But every circuit I have looked at for driving a digital output has the resistor on the collector side with the output between the resistor and the collector, and the Emitter tied to Ground. Using the typical connection does not enable me to read each transistor separately. I need to read each output on the emitter side.

Thoughts, Suggestions?

I may have answered my own question. Found this document which explains the two options for wiring up a photo transistor:

http://www.fairchildsemi.com/an/AN/AN-3005.pdf

Page one talks about a "Common-Emitter Amplifier", which is what I see most often used, including the test circuit diagram in the spec sheet.

But page one also talks about a "Common-Collector Amplifier" where the resistor is placed after the photo transistor on the emitter.

This page also mentions the same and says the following: http://www.radio-electronics.com/info/data/semicond/phototransistor/photo-transistor-circuits-symbols.php

"Common collector phototransistor circuit The common collector, or emitter follower phototransistor circuit configuration has effectively the same topology as the normal common emitter transistor circuit - the emitter is taken to ground via a load resistor, and the output for the circuit being taken from the emitter connection of the device. The circuit generates an output that moves from the low state to a high state when light is detected."

So, I guess this answers my question. Therefore, I simply need to follow the instructions and formula for selecting the correct resistor to determine the output type, switching or amplifier.

Thanks for any additional input anyone provides!