US 11,936,496 B2
CAN transmitter with fast CANL loop and switched output cascode
Burkhard Gehring, Heilbronn (DE)
Assigned to Microchip Technology Incorporated, Chandler, AZ (US)
Filed by Microchip Technology Incorporated, Chandler, AZ (US)
Filed on Dec. 13, 2021, as Appl. No. 17/548,666.
Claims priority of provisional application 63/132,511, filed on Dec. 31, 2020.
Prior Publication US 2022/0209982 A1, Jun. 30, 2022
Int. Cl. H04L 12/40 (2006.01); H03K 17/687 (2006.01)
CPC H04L 12/40006 (2013.01) [H03K 17/6872 (2013.01); H04L 2012/40215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A controller area network (CAN) transmitter, comprising:
an output stage circuit including a CANH port and a CANL port;
an input stage circuit to receive an input signal, the input signal to indicate whether the output stage circuit is to provide dominant or recessive states;
a first cascode circuit to provide output signals on the output stage circuit to provide dominant or recessive states based on the input signal;
a first switch circuit to, based upon the input signal, switch the first cascode circuit on and off;
a second cascode circuit configured to provide output signals on the output stage circuit to provide dominant or recessive states based on the input signal; and
a second switch circuit configured to, based upon the input signal, switch the second cascode circuit on and off;
wherein the first switch circuit and second switch circuit are to, based upon an indication from the input signal to output a recessive state, switch off the first cascode circuit and the second cascode circuit to short-circuit sources of the first cascode circuit and the second cascode circuit.