Signal generator and signal converter using same
First Claim
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1. A signal generator to generate at its output a first variable output signal comprising:
- at least one first charge transfer device having a plurality of stages;
clocking means coupled to given ones of said plurality of stages to clock a first input signal into said first transfer device and to step the contents thereof through said first transfer device; and
an output circuit coupled to at least one of said plurality of stages to collect portions of said first input signal present in said one of said plurality of stages as a function of said first variable output signal to be generated and to further process said signal portions, said output circuit includingfirst gating means formed as a part of said first transfer device coupled to said one of said plurality of stages to selectively collect and to gate said signal portions to said generator output.
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Abstract
The signal generator comprises a charge transfer device providing an output signal having any desired shape so that it is particularly useful in an A/D or D/A converter. In this device charges are transferred under electrodes of which some are split in order to obtain charge portions which are then removed or transferred to the output of the device where they are added to or subtracted from previous charge portions to finally obtain a desired output signal.
4 Citations
24 Claims
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1. A signal generator to generate at its output a first variable output signal comprising:
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at least one first charge transfer device having a plurality of stages; clocking means coupled to given ones of said plurality of stages to clock a first input signal into said first transfer device and to step the contents thereof through said first transfer device; and an output circuit coupled to at least one of said plurality of stages to collect portions of said first input signal present in said one of said plurality of stages as a function of said first variable output signal to be generated and to further process said signal portions, said output circuit including first gating means formed as a part of said first transfer device coupled to said one of said plurality of stages to selectively collect and to gate said signal portions to said generator output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A signal converter comprising:
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a comparator for comparing a comparator input signal to be converted with a first reference signal and for providing a comparator output signal when said comparator input signal and said first reference signal satisfy a predetermined relationship, said comparator having a first input to receive said comparator input signal, a second input for receiving said first reference signal and an output at which appears said comparator output signal; and a signal generator according to claim 38 to provide said first reference signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification