Title: Digital medium-frequency discriminator
Application Number: 200410049838 Application Date: 2004.06.25
Publication Number: 1713515 Publication Date: 2005.12.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03D7/00
Applicant(s) Name: Shengqun Semiconductor Co., Ltd. Address:
Inventor(s) Name:
Attorney & Agent: sun haochen he hualian
Abstract:
     In RF receiver, an antenna receives RF signal from outside. After frequency reduction is made through mixer and band pass filter, the RF signal is reduced to if signal. Through if amplifying, it is transmitted to a digital if discriminator. The digital if discriminator consists of a digital mixer used to convert the if signal from outside into a audio signal, a digital lowpass filter used to filter all noise except audio signal, a digital audio discriminator used to discriminate audio signal.
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