US 12,119,823 B2
Wide frequency range voltage controlled oscillator
Santosh Mahadeo Narawade, Bangalore (IN); Jithin K, Bangalore (IN); and Mohit Gupta, San Jose, CA (US)
Assigned to Alphawave Semi, Inc., Milpitas, CA (US)
Filed by Open Silicon, Inc., Milpitas, CA (US)
Filed on Nov. 29, 2022, as Appl. No. 18/071,162.
Claims priority of provisional application 63/284,342, filed on Nov. 30, 2021.
Prior Publication US 2023/0170884 A1, Jun. 1, 2023
Int. Cl. H03K 3/0231 (2006.01); H03K 3/014 (2006.01); H03K 3/03 (2006.01); H03K 5/133 (2014.01); H03L 7/099 (2006.01)
CPC H03K 3/0231 (2013.01) [H03K 3/014 (2013.01); H03K 3/0315 (2013.01); H03K 5/133 (2013.01); H03L 7/0995 (2013.01); H03K 3/0322 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a Voltage Controlled Oscillator (VCO) including a delay cell, the delay cell including first and second current sources in parallel with one another, the first current source being controlled by a voltage control input connected to a voltage control terminal and the second current source being controlled by a bias voltage input connected to a bias voltage terminal, wherein the first current source provides an alternate current path in the delay cell when the second current source is off, and wherein the delay cell is operable to receive an input and produce an output using the alternate current path, and
a bias circuit configured to generate the bias voltage input based on the voltage control input.