An FM receiver for suppressing the high frequency noise filter circuit, the circuit has a first filter and a second filter branch parallel branch. 第一滤波器分支具有一个高通滤波器(11)和一个用于将通过第一滤波器分支的信号和指示高频噪声的控制信号相乘的乘法器(13). A first filter branch having a...
The filter circuit in order to oppress the high frequency noise in the FM receiver the first filter branch which is jointed in parallel and has had second filter branch. First filter branch highpass filter has had the multiplier 13 in order to multiply the signal which passes 11, and first...
Keep any cell phones or two-way radios at least 20 feet from an FM receiver. Cell phones, even when not in use, send out pings that are picked up by FM receivers. As an experiment, place a cell phone next to an FM receiver for a few minutes and listen to when the pings are sent...
PURPOSE:To prevent malfunction due to white noise in a very weak electric field or a weak electric field by applying AM detection to an intermediate frequency signal, and disconnecting the output of an FM detection circuit when a high frequency component level after clipping exceeds a prescribed ...
A noise removing apparatus in an FM receiver includes a high- pass filter (29) receiving an output from an FM detector circuit (11), a gate (15) being interrupted in response to a pulsive noise detected by level- discriminating an output... H Kishi - US 被引量: 43发表: 1982年 FM ...
CONSTITUTION:The output of an FM detecting circuit 1 is inputted through an HPF6 and a noise amplifier 7 to a noise detecting circuit 8 and a rectifying circuit 12. The noise detecting circuit 8 detects a high level signal as a noise detecting signal and an output is waveform-shaped in ...
PULSE NOISE ELIMINATOR FOR FM RECEIVER 优质文献 相似文献A Simple Noise Eliminator for Television Receiver Synchronising Circuits This paper outlines the problems that arise in the television receiver as a result of impulse noise, and describes briefly some methods that have been used... K James - ...
Noise pops in the audio output of a receiver due to Rayleigh fading of the received signal are minimised by using a controllable attenuator (30) in series with the audio output. A first signal (40) is generated which is proportional to the strength of the received signal. A second signal ...
IMPULSIVE NOISE ELIMINATION DEVICE IN FM RECEIVER 专利名称：IMPULSIVE NOISE ELIMINATION DEVICE IN FM RECEIVER 发明人：KAWAKAMI YASUO 申请号：JP5959788 申请日：19880314 公开号：JPH01232831A 公开日：19890918 专利内容由知识产权出版社提供 摘要：PURPOSE:To prevent malfunction due to white noise in a very ...
In a single conversion FM receiver, depending on the design, the LO may track above or below the tuned operating frequency by 10.7MHz. When the tuned operating and LO frequencies are applied to the receiver mixer section, one of the outputs of the mixer is the 10.7MHz. If another carrier...