Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
An electrical switching device, said device including a high-gain differential amplifier having first and second input terminals, an impedance continuously connected at one end to the first of said input terminals, said impedance being connected at the other end to a third terminal for receiving an input signal, and switching means for connecting the second of said input terminals alternately between said third terminal and a fourth terminal for receiving a signal of a magnitude lower than the input signal to said thrid terminal, said switching means including a pair of field effect transistors, one connected between said second and third terminals, and the other connected between said second and fourth terminals.
Claim 2
Dependent Claim
112 words
An electrical switching device, said device including a high-gain differential amplifier having first and second input terminals, an impedance continuously connected at one end to the first of said input terminals, said impedance being connected at the other end to a third terminal for receiving an input signal, and switching means for connecting the second of said input terminals alternately between said third terminal and a fourth terminal for receiving a signal of a magnitude lower than the input signal to said thrid terminal, said switching means including a pair of field effect transistors, one connected between said second and third terminals, and the other connected between said second and fourth terminals.
Claim 3
Dependent Claim
29 words
A device as in claim 1 in which said differential amplifier is an operational amplifier with a feed-back impedance connected between its output terminal and said first input terminal.
Claim 4
Dependent Claim
23 words
A device as in claim 1 in which said first terminal is an inverting terminal, and said second terminal is a non-inverting terminal.
Claim 5
Dependent Claim
45 words
A device as in claim 3 in which one of said transistors is of the P-channel type, and the other is of the N-channel type, a common connection to the gate leads of the transistors, and a switching signal source connected to said common connection.
Claim 6
Dependent Claim
52 words
A device as in claim 3 in which said transistors are of the same channel type, a switching signal source, means connecting the output of said source directly to the gate lead of one of said transistors, and an inverter connecting said source output to the gate lead of the other transistor.
Claim 7
Dependent Claim
13 words
A device as in claim 1 in which said impedance is a resistor.
Claim 8
Dependent Claim
21 words
A device as in claim 1 in which said fourth terminal is common to the input and output of the circuit.
Claim 9
Dependent Claim
167 words
A circuit device including a high-gain differential amplifier having two input terminals and an output terminal, and means for reversing the polarity of the output signal on said output terminal in response to a change in polarity of the difference between the input signals on said input terminals, an impedance continuously connected at one end to a first one of said input terminals and being connected at the other end to a third signal-receiving terminal, a fourth terminal for receiving a reference signal, switching means for connecting the second of said input terminals alternately to said third terminal and said fourth terminal, said differential amplifier including a summing circuit, an inverter connected between one of said input terminals and said summing circuit, said other input terminal being connected to deliver an uninverted input signal to said summing circuit, a signal amplifier connected to receive the output of said summing circuit, and a feed-back impedance connected between said one input terminal and the output of said signal amplifier.
Claim 10
Dependent Claim
167 words
A circuit device including a high-gain differential amplifier having two input terminals and an output terminal, and means for reversing the polarity of the output signal on said output terminal in response to a change in polarity of the difference between the input signals on said input terminals, an impedance continuously connected at one end to a first one of said input terminals and being connected at the other end to a third signal-receiving terminal, a fourth terminal for receiving a reference signal, switching means for connecting the second of said input terminals alternately to said third terminal and said fourth terminal, said differential amplifier including a summing circuit, an inverter connected between one of said input terminals and said summing circuit, said other input terminal being connected to deliver an uninverted input signal to said summing circuit, a signal amplifier connected to receive the output of said summing circuit, and a feed-back impedance connected between said one input terminal and the output of said signal amplifier.
Claim 11
Dependent Claim
86 words
A device as in claim 9 in which said differential amplifier is an integrated operational amplifier and said feed-back impedance is an external resistor, the first-named impedance is a resistor, said switching means comprises a first field-effect transistor with its source-drain path connected between said second and third terminals, a second field-effect transistor with its source-drain path connected between said second terminal and ground, and means connected to the gate leads of said transistors for turning one of said transistors on while turning the other off.