| Title: | Demodulator circuits | ||
| Application Number: | 99804426 | Application Date: | 1999.03.19 |
| Publication Number: | 1294777 | Publication Date: | 2001.05.09 |
| Approval Pub. Date: | Granted Pub. Date: | ||
| International Classifi-cation: | H03C3/06;H03D3/00;H03J7/02 | ||
| Applicant(s) Name: | Telefonaktiebolaget Lm Ericsson | Address: | |
| Inventor(s) Name: | S. Mattisson;J. Haartsen | ||
| Attorney & Agent: | chen ji | ||
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Abstract: |
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| A demodulator circuit for demodulating a frequency modulated input signal comprises filter means (12) for receiving an incoming input signal and for providing a filtered output signal, detector means (16) for receiving the filtered output signal, and for producing a demodulated output signal therefrom, tuning means (18, 20) which are operable to introduce a test signal into the demodulator circuit in the absence of an incoming input signal, and to vary the frequency response characteristics of at least one of the filter means and detector means in response to the test signal. | |||
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| Time: | 17 | ||
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