Adams & Wilks
A/D converter circuit having ladder resistor network with alternating first and second resistors of different resistance values
 In a resistor ladder circuit for supplying reference voltages to sub-A/D converter circuits constituting a pipeline type A/D converter, the circuit is configured in such a way that main resistors are connected in series with auxiliary resistors in order to produce a plurality of reference voltages so that the reference voltages which are supplied to an MDAC in the first stage differ from those which are supplied to the MDACs in and after the second stage. 
Seiko Instruments Inc.
H H H H
H03M H03M H03M H03M
inventional additional additional additional
Hirokazu
Yoshizawa