Electrical charge transfer apparatus
First Claim
1. A charge transfer circuit comprisingan input terminal for receiving an input electrical charge,transconductance amplifier means having at least an inverting input, and at least one differential current output, the input being coupled to the input terminal,means responsive to the differential current output for producing two or more electrical current output signals whose values are linearly related to the value of the differential current output and to each other, andfeedback means for delivering one of the electrical current output signals to the input of the amplifier means.
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Abstract
A charge transfer circuit includes an input terminal for receiving an input electrical charge, a transconductance amplifier having first and second inputs including an inverting input, and first and second differential current outputs, and a multiple output stage circuit responsive to the differential current outputs for producing two or more electrical current output signals whose values are related to the values of the differential current outputs and to each other. Also included is a feedback loop for delivering one of the electrical current output signals to the inverting input of the transconductance amplifier, and an integrator for integrating another of the electrical current output signals to produce an output electrical charge whose value is related to the value of the input electrical charge.
166 Citations
8 Claims
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1. A charge transfer circuit comprising
an input terminal for receiving an input electrical charge, transconductance amplifier means having at least an inverting input, and at least one differential current output, the input being coupled to the input terminal, means responsive to the differential current output for producing two or more electrical current output signals whose values are linearly related to the value of the differential current output and to each other, and feedback means for delivering one of the electrical current output signals to the input of the amplifier means.
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6. Differential charge transfer apparatus comprising
first and second individual charge transfer circuits for receiving first and second input charges respectively, each of said charge transfer circuits including a transconductance amplifier having an inverting input for receiving the respective input charge, arid a differential current output, a multiple output stage means for developing at least three current output signals whose magnitudes are related to one another and are determined by the magnitude of the differential current output, and a feedback loop for supplying a first current output signal to said inverting input of the transconductance amplifier, first means for summing a second current output signal from the multiple output stage means of the first individual charge transfer circuit and a third current output signal from the multiple output stage means of the second individual charge transfer circuit, to produce a first summed current signal, and second means for summing a third current output signal from the multiple output stage means of the first individual charge transfer circuit and a second current output signal from the multiple output stage means of the second individual charge transfer circuit, to produce a second summed current signal.
Specification