Control Voltage Analog Shift Register
A little history of the ASR: http://hardsync.blogspot.no/2009/03/brief-history-of-analog-shift-registers.html
"the cgs734 is an analog control voltage shift register, three stages in length. it duplicates the functionality of the serge asr, but goes about it in a very different way. it is great for producing "arabesque-like" sequences, trills etc., when used with vcos. of course it's use is not limited to vcos only.
unlike asrs produced using "bucket brigade" techniques, the cv outputs are constant from the beginning of the cycle to the end - there is no "charge period" in which a brief glide is heard."
-A. Haven
http://www.elby-designs.com/contents/en-us/p734_CGS734_-_Analog_Shift_Register.html
No info about availability.
$135