Sample-and-hold unit with high sampling frequency
AssigneeThomson Composants Microondes
InventorsChristian Guiberteau, Michele Le Paih, Stephane Ruggeri
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Abstract
Disclosed is a sample-and-hold unit more especially designed to work at microwave frequencies (>1 GHz). In order to increase the sampling frequency, the disclosed circuit has at least two identical parallel channels. Each channel has a first follower switch (9) a capacitor (11) and a second holding switch (15). The channels are controlled by a single clock, the complementary or phase-shifted signals (H, H) of which address the samples sequentially towards the output (8). The disclosed device can be applied to the processing of analog signals.
Claims7
A sample and hold unit comprising:
- an input for receiving an input signal;
- at least two parallel circuits, each receiving said input signal and each parallel circuit comprising:
- a first follower switch to load a sample of said input signal into a capacitor when said first switch is closed;
- a second holder switch to transfer the loaded sample to an output when said second switch is closed;
- a sampling clock signal for controlling said first and second switches of a first parallel circuit;
- and
- at least one phase-shifted sampling clock signal for controlling said first and second switches of a respective at least one second parallel circuit;
- wherein each of said parallel circuits sequentially transmits to said output the sample loaded in the capacitor of said respective parallel channel when said second switch of said respective parallel channel is closed.
Dependencies are inferred from the claim text.