Patent EP0505072A2 successfully refreshed from Google Patents.
EP0505072A2
Expired / Lapsed
EP
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Signal strength indicator for receiver
Assignee: Panasonic Holdings Corp
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Filing: 1992-03-10
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Granted: —
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Expires: 2012-03-10
Abstract
Abstract For realizing a correct measurement of a receiving condition even if the bandwidth of intermediate frequency amplification is narrow, the gain of a variable gain amplitude detector circuit (116, 16) is controlled by an output signal of a function generator circuit (110, 410, 610, 710, 810) so as to cancel the bandwidth characteristic of an intermediate frequency amplifier circuit (13), to make flat the total bandwidth characteristic of a circuit (17, 18, 19) for detecting an amplitude value of a received signal, thereby eliminating the influence of angle modulation related components in the received signal or desired wave.
Inventors
- 👤 Masaharu Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:10
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0817
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A receiver comprising: function generator means (110) coupled to receive a demodulated signal; first detector means (116) for detecting an amplitude value of a received signal controlled the gain by an output signal of said function generator means; second detector means (17, 18, 19) for detecting the magnitude of a change from an output signal of said first detector means; comparator means (4) coupled to receive an output signal of said second detector means for comparing the output signal with a set value; and variable transmission means (15) coupled to receive a demodulated signal controlled by an output signal of said comparator circuit.
Claim 2
Dependent Claim
110 words
A receiver comprising: function generator means (410) coupled to receive a demodulated signal; first detector means (16) for detecting an amplitude value of a received signal; adder means (416) for adding an output signal of said first detector means to an output signal of said function generator means; second detector means (17, 18, 19) for detecting the magnitude of a change from an output signal from said adder means; comparator means (4) coupled to receive an output of said second detector means at an input thereof; and variable transmission means (15) controlled by an output of said comparator means and coupled to receive the demodulated signal at an input thereof.
Claim 3
Dependent Claim
119 words
A receiver comprising: function generator means (710) coupled to receive a demodulated signal; first detector means (16) for detecting an amplitude value of a received signal; a low pass filter (718), the cut-off frequency of which is controlled by said function generator means, coupled to receive an output of said first detector means; second detector means (19) coupled to receive an output signal from said low pass filter for detecting the magnitude of a change; comparator means (4) coupled to receive an output signal of said second detector means for comparing the output signal with a set value; and variable transmission means (15) controlled by an output signal of said comparator means and coupled to receive the demodulated signal.
Claim 4
Dependent Claim
114 words
A receiver comprising: function generator means (610) coupled to receive a demodulated signal; first detector means (16) for detecting an amplitude value of a received signal; track/hold means (616) controlled by said function generator means and coupled to receive an output signal of said first detector means; second detector means (17, 18, 19) coupled to receive an output signal of said track/hold circuit for detecting the magnitude of a change; comparator means (4) coupled to receive an output signal from said second detector means for comparing the output signal with a set value; and variable transmission means (15) controlled by an output signal of said comparator means and coupled to receive the demodulated signal.
Claim 5
Dependent Claim
105 words
A receiver comprising: function generator means (810) coupled to receive a demodulated signal; first detector means (16) for detecting an amplitude value of a received signal; second detector means (17, 18, 819), the gain of which is controlled by said function generator means, coupled to receive an output signal of said first detector means for detecting the magnitude of a change; comparator means (4) coupled to receive an output signal of said second detector means for comparing the output signal with a set value; and variable transmission means (15) controlled by an output signal of said comparator means and coupled to receive the demodulated signal.
Claim 6
Dependent Claim
43 words
A receiver according to Claim 1, wherein said function generator means (10) includes a first input for receiving the demodulated signal and a second input for receiving the output of said first detector means for detecting an amplitude value of a received signal.
Claim 7
Dependent Claim
43 words
A receiver according to claim 2, wherein said function generator means (410) includes a first input for receiving the demodulated signal and a second input for receiving the output of said first detector means for detecting an amplitude value of a received signal.
Claim 8
Dependent Claim
43 words
A receiver according to claim 3, wherein said function generator means (710) includes a first input for receiving the demodulated signal and a second input for receiving the output of said first detector means for detecting an amplitude value of a received signal.
Claim 9
Dependent Claim
43 words
A receiver according to claim 4, wherein said function generator means (610) includes a first input for receiving the demodulated signal and a second input for receiving the output of said first detector means for detecting an amplitude value of a received signal.
Claim 10
Dependent Claim
43 words
A receiver according to claim 5, wherein said function generator means (810) includes a first input for receiving the demodulated signal and a second input for receiving the output of said first detector means for detecting an amplitude value of a received signal.
References Cited (Backward Citations)
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