(http://www.nba.com/analysis/rules_5.html?nav=ArticleList)
My head hurt reading that.
Each team gets one 20 second TO per half, with any OT included in the 2nd half.
Each team gets 6 full TO per game, with a maximum of 3 in the 4Q. They get 3 full TO in each OT.
Ignoring the uncharged TV TO, in each quarter if there has been no TO in the first 6 minutes, a TO will be charged to the home team at 1st dead ball. If there hasn't been a 2nd TO in the first 9 minutes, a TO will be charged to the other team at the 1st dead ball.
I think that the charged TO would be easy enough to implement. Currently, BB will call a TO if one team goes on a run. I don't know what effect this has on the game - it might be that less experienced players panic and take poorer shots, make turnovers in such a situation, and the TO calms them. Maybe the coach can make adjustments to the defense.
So if there were charged TO, the GE might consider holding off on calling a panic TO if there will be a charged TO coming up. And it probably would generally avoid two TO in any of the 1st 3Q since that cuts into those available in the 4Q.