Brown's main achievements as a manager came with Hull, whom he led to Championship play-off final glory in 2008 before keeping them in the Premier League during the 2008-09 season.
He was put on gardening leave in March 2010 with the Tigers embroiled in another relegation battle and left in June after both sides agreed a compensation deal.
"Having sat down with the chairman [Maurice Lindsay] and the owner [Trevor Hemmings] I was more than excited after the conversations we had," Brown added.
"They were one of ambition, one of trying to get out of the situation that we're in, but one we think that we can achieve.
"I know there's a lot of apathy around at the moment because of where we are in the division but we know exactly what's required. We've been there before and the confidence of the players needs raising immediately.
"When you're at the bottom of the division everything seems to go against you and you slip into that negative mode, but if we can take what we do during training into Saturday then we've got half a chance."
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