Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
An analog-to-digital signal acquisition system comprising: a plurality of input channels; a multiplexer having a plurality of inputs and a common output bus; a capacitor connected between each of said input channels and one of said multiplexer inputs, each said capacitor having a spurious voltage developed thereacross; means for connecting one of said input channels to ground; circuit means including an amplifier for connecting said multiplexer bus to a utilization device; and
Claim 2
Dependent Claim
72 words
An analog-to-digital signal acquisition system comprising: a plurality of input channels; a multiplexer having a plurality of inputs and a common output bus; a capacitor connected between each of said input channels and one of said multiplexer inputs, each said capacitor having a spurious voltage developed thereacross; means for connecting one of said input channels to ground; circuit means including an amplifier for connecting said multiplexer bus to a utilization device; and
Claim 3
Dependent Claim
81 words
a sample-and-hold circuit connected between said circuit means and said utilization device, said sample-and-hold circuit means comprising a shunt switch and a series capacitor for developing a sample voltage thereacross equal and of opposite polarity to said spurious voltage each time that the grounded input channel is scanned by said multiplexer and said shunt switch is closed, whereby in use, the sample voltage will successively cancel out the spurious voltages from said signal-receiving channels, as the multiplexer scans the signal-receiving channels.
Claim 4
Dependent Claim
81 words
a sample-and-hold circuit connected between said circuit means and said utilization device, said sample-and-hold circuit means comprising a shunt switch and a series capacitor for developing a sample voltage thereacross equal and of opposite polarity to said spurious voltage each time that the grounded input channel is scanned by said multiplexer and said shunt switch is closed, whereby in use, the sample voltage will successively cancel out the spurious voltages from said signal-receiving channels, as the multiplexer scans the signal-receiving channels.
Claim 5
Dependent Claim
26 words
The system of claim 1 wherein the capacitor in the grounded input channel and the capacitors in the other input channels have the same capacitance value.
Claim 6
Dependent Claim
17 words
The system as defined in claim 1 wherein said utilization circuit is a binary gain ranging amplifier.
Claim 7
Dependent Claim
15 words
The system as defined in claim 1 wherein said circuit means includes a buffer amplifier.
Claim 8
Dependent Claim
18 words
The system as defined in claim 1 wherein said circuit means is a signal conditioning and amplifying network.
Claim 9
Dependent Claim
31 words
The system as defined in claim 1 wherein means for applying analog signals having a wide dynamic range are connected to all of said input channels except said one input channel.
Claim 10
Dependent Claim
23 words
The system as defined in claim 1 wherein seismic sensors are connected to all of said input channels except said one input channel.
Claim 11
Dependent Claim
39 words
The system as defined in claim 1 wherein said system includes controller circuit means for concurrently connecting said one grounded input circuit to said multiplexer and for closing said shunt switch to ground the output of said series capacitor.