发明名称 |
DEMODULATORSCHALTUNG |
摘要 |
<p>A demodulator circuit for demodulating a signal which varies substantially sinusoidally with time, such as a stereo signal having a carrier frequency, comprises a mixer circuit having a first input with a linear transfer characteristic which receives the stereo multiplex signal um to be demodulated and having a second input with a substantially hyperbolic tangent transfer characteristic, the second input receiving a signal ud. The signal ud is a voltage having a triangular wave shape superimposed with the triangular wave shape having the carrier frequency. A stereo output signal L and R is produced having minimal third and fifth harmonics of the carrier frequency is produced from a matrix circuit as a result of the triangular shape and amplitude of the signal ud.</p> |
申请公布号 |
DE3114761(A1) |
申请公布日期 |
1982.10.28 |
申请号 |
DE19813114761 |
申请日期 |
1981.04.11 |
申请人 |
PHILIPS PATENTVERWALTUNG GMBH |
发明人 |
JANTA,DIETER,DIPL.-ING.;NOLDE,WOLFGANG,DR. |
分类号 |
H04H20/88;H03D1/06;H03D1/22;(IPC1-7):03D1/06;04S1/00;03D1/22;03D1/24 |
主分类号 |
H04H20/88 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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