8. The output of each inverter is connected to the primary
input of a succeeding inverter.
9. The secondary input of each inverter is connected to the
output of the Mth proceeding inverter, where M is an odd integer,
equal or greater than three.
10. Count 1, the sole count of the interference, is
identical to claim 1 of Chern and is as follows:
A ring oscillator for use in a charge pump comprising N
inverter stages each having a primary input, a secondary
input, and an output, wherein N is an odd integer,
the output of each inverter stage is coupled to the
primary input of the following inverter stage in a serially
connected ring fashion such that the output of a last
inverter stage is coupled to the primary input of a first
inverter stage and forms an oscillating signal output, and
the secondary input of each stage is coupled to the
output of an Mth preceding inverter stage, wherein M is an
odd integer greater or equal to three.
11. An example of a circuit of the count is shown in
Chern's '529 patent Fig. 8 as follows:
20 210 211 212 213
X X A X X 11 X X X X X X X
41'c is
PUMP Fig.6
4 It'o-4
3
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Last modified: November 3, 2007