| 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. | |||
|
|
|||
| Time: | 10 | ||
<- Previous Patent:Carrier detecting circuit and inf...
| Next Patent:Digital phase-frequency identific... ->
|
|||