US 12,170,509 B2
Sampling and holding electrical signals with rail-to-rail equivalent output swing
Oleksiy Zabroda, Constable, NY (US)
Assigned to Cisco Technology, Inc., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Mar. 3, 2023, as Appl. No. 18/178,394.
Prior Publication US 2024/0297626 A1, Sep. 5, 2024
Int. Cl. H03F 3/45 (2006.01)
CPC H03F 3/45475 (2013.01) 19 Claims
OG exemplary drawing
 
1. A circuit for sampling and holding electrical signals comprising:
a sample and hold amplifier comprising:
a first input node;
a first output node;
at least two capacitors, where each capacitor of the at least two capacitors comprises a bottom plate and a top plate, where each respective top plate is coupled to the first input node and the first output node;
a first PMOS transistor comprising:
a gate node connected to a bottom plate of a first capacitor of the at least two capacitors; and
a drain node coupled to an input node of a first current mirror, where an output of the first current mirror is coupled to a second output node of the sample and hold amplifier; and
a first NMOS transistor comprising:
a gate node connected to a bottom plate of a second capacitor of the at least two capacitors; and
a drain node coupled to an input node of a second current mirror, where an output of the second current mirror is coupled to the second output node of the sample and hold amplifier.