Telemetry system for transmitting analog data over a telephone line
First Claim
Patent Images
1. A receiving system for a single channel analog telemetry system comprising:
- an FSK demodulator responsive to a transmitted FSK signal for producing therefrom a frequency modulated information-containing signal containing a range of frequencies;
a frequency multiplier responsive to the output of said FSK demodulator for multiplying the frequencies of said demodulator output to produce therefrom an intermediate frequency signal whose frequencies are higher than the frequencies of the demodulator output; and
a frequency-to-amplitude converter responsive to the output of said frequency multiplier for producing an analog output signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An FSK receiver for a single channel analog telemetry system comprises an FSK demodulator, a frequency multiplier, and a frequency-to-voltage converter. An FSK transmitter comprises a voltage-to-frequency converter, a frequency divider, and an FSK tone generator. The principal advantages of this system are greater speed due to faster settling time and reduced errors in accuracy and linearity.
-
Citations
9 Claims
-
1. A receiving system for a single channel analog telemetry system comprising:
-
an FSK demodulator responsive to a transmitted FSK signal for producing therefrom a frequency modulated information-containing signal containing a range of frequencies; a frequency multiplier responsive to the output of said FSK demodulator for multiplying the frequencies of said demodulator output to produce therefrom an intermediate frequency signal whose frequencies are higher than the frequencies of the demodulator output; and a frequency-to-amplitude converter responsive to the output of said frequency multiplier for producing an analog output signal. - View Dependent Claims (2, 3, 5)
-
-
4. A transmitting system for a single channel analog telemetry system comprising:
-
an amplitude-to-frequency converter responsive to an analog input signal for generating in response thereto a modulated intermediate frequency FM signal containing a range of frequencies; a frequency divider responsive to the output of said amplitude-to-frequency converter for dividing down the frequencies of said intermediate frequency signal to produce an FSK keying signal whose frequencies are lower than the frequencies of the amplitude-to-frequency converter output; and an FSK tone transmitter responsive to the output of said frequency divider for generating an FSK tone signal transmittable over a telephone line. - View Dependent Claims (6)
-
-
7. A telemetry system comprising:
-
a amplitude-to-frequency converter responsive to a input signal for generating a modulated intermediate frequency FM signal in response thereto; a frequency divider responsive to the output of said amplitude-to-frequency converter for dividing down said intermediate frequency signal to a lower frequency FSK keying signal; an FSK tone transmitter responsive to the output of said frequency divider for generating an FSK tone signal transmittable over a telephone line; an FSK demodulator responsive to a transmitted FSK signal for producing a frequency modulated information-containing signal therefrom; a frequency multiplier responsive to the output of said FSK demodulator for producing therefrom an intermediate frequency signal whose frequency is higher than the frequency of the demodulator output; and a frequency-to-amplitude converter responsive to the output of said frequency multiplier for producing an analog output signal. - View Dependent Claims (8, 9)
-
Specification