Raja's request to Lok Sabha Speaker Meira Kumar comes days after Attorney General G E Vahanvati blamed him for various issues before the Joint Parliamentary Committee (JPC).
He has also been blamed for the 2G scam by other witnesses before the special CBI court.
"The truth of the matter is being suppressed on the basis of preconceived notions, deliberate bias, faulty investigation and erroneous conclusions.
Raja's request has come when the three-month-long Budget session has just commenced.
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There was no immediate reaction of JPC Chairman P C Chacko to the request of Raja, who had been in Tihar jail for several months in the 2G issue before being granted bail.
Congress spokesperson Rashid Alvi steered clear of the issue while an AIADMK leader said it was a fight between DMK and Congress and his party would not get into it.
He has sent a copy of the letter to Chacko.
Raja said while he has the "fullest respect" for the court, "the fact remains that I have been condemned unheard.