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Fm receiver

A receiver and signal receiving technology, applied in broadcast receiving circuits, stereo broadcast receiving, advanced technology, etc., can solve problems such as power consumption, and achieve the effects of reducing power consumption, reducing the number, and reducing the deterioration of circuit operation stability.

Inactive Publication Date: 2007-02-21
TOYOTA IND CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even when a monaural output is generated, a signal is transmitted via the stereo demodulator unit, so power is ineffectively consumed by the stereo demodulator unit

Method used

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  • Fm receiver
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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] figure 2 is a block diagram showing the configuration of an FM receiver according to an embodiment of the present invention. In addition, mounting on a semiconductor integrated circuit substrate figure 2 At least some of the components, such as switches 13 and 17, stereo channel demodulator unit 15, channel 1 and channel 2, the semiconductor integrated circuit substrate can generate P-channel MOS transistors and N-channel MOS transistors CMOS process flow production,.

[0030] exist figure 2 Among them, the FM receiver of the embodiment of the present invention includes an FM detector unit 11 , switches 13 and 17 , a stereo channel demodulator unit 15 and an output buffer 19 .

[0031] The operation of the FM receiver will be explained below.

[0032] First, FM radio waves are received by an antenna (not shown), and detection proces...

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PUM

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Abstract

An FM receiver which can be used by being switched between stereophonic and monophonic, and comprises detecting means for detecting a received signal, two routes over which a detected signal is transmitted to an output buffer, and a switching means for selecting either one of the two routes. The two routes consists of a route going through a stereophonic demodulating unit and a route bypassing the stereophonic demodulating unit; and the switching means selects either one of the two routes based on a control signal indicating the selection of either one of stereophonic and monophonic, and, when the route bypassing the stereophonic demodulating unit is selected, turns off power supply to the stereophonic demodulating unit based on the above control signal.

Description

technical field [0001] The invention relates to an FM receiver capable of reducing power consumption. Background technique [0002] By convention, in figure 1 In the shown FM receiver, FM radio waves are received by an antenna unit (not shown), prescribed detection processing is carried out in an FM detection unit 51, and a circuit including a stereo channel demodulator circuit, a 38 kHz stereo generator circuit and a pilot Stereo channel demodulation processing is performed in the stereo channel demodulator unit 52 of the signal detector circuit. Then, the signal that has undergone stereo channel demodulation is output as audio information via the output buffer 53 . [0003] The FM receiver described above is used by switching between stereo and mono. However, even when a monaural output is generated, a signal is transmitted via the stereo demodulator unit, so power is inefficiently consumed by the stereo demodulator unit. [0004] As for a method of effectively reducin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/16H04H1/00H04H20/88H04H40/81
CPCH04B1/1653H04H20/88H04H40/81Y02D30/70H04B1/16
Inventor 古池刚宫城弘
Owner TOYOTA IND CORP
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