Abstract: A pipelined analog-to-digital converter (ADC) using a multiplying digital-to-analog converter (MDAC) and two sub-range analog-to-digital converters (sub-range ADCs) is disclosed. The MDAC samples an analog input and performs multiplication on the sampled analog input based on control bits. The first sub-range ADC provides the MDAC with the control bits. The second sub-range ADC is coupled to the MDAC for conversion of a multiplied signal output from the MDAC. The first sub-range ADC samples the analog input to generate the control bits for the MDAC as well as pre-estimated bits for the second sub-range ADC. The second sub-range ADC operates based on the pre-estimated bits and thereby a first section of digital bits are generated by the second sub-range ADC. A second section of digital bits are provided by the first sub-range ADC. The first and second sections of digital bits represent the analog input.

Abstract: A pipelined analog-to-digital converter (ADC) using a multiplying digital-to-analog converter (MDAC) and two sub-range analog-to-digital converters (sub-range ADCs) is disclosed. The MDAC samples an analog input and performs multiplication on the sampled analog input based on control bits. The first sub-range ADC provides the MDAC with the control bits. The second sub-range ADC is coupled to the MDAC for conversion of a multiplied signal output from the MDAC. The first sub-range ADC samples the analog input to generate the control bits for the MDAC as well as pre-estimated bits for the second sub-range ADC. The second sub-range ADC operates based on the pre-estimated bits and thereby a first section of digital bits are generated by the second sub-range ADC. A second section of digital bits are provided by the first sub-range ADC.

Abstract: Network traffic with encrypted packet payloads is classified based on monitored Domain Name System (DNS) query requests and responses. A network appliance, or some other computer, receives a DNS query request for a network name (e.g., host name) of a content server, and starts monitoring for a corresponding DNS query response. The network appliance receives the DNS query response and parses the DNS query response to retrieve an Internet Protocol (IP) address associated with the network name. The network appliance classifies the IP address as belonging to the content server or a network application associated with the content server. When the network appliance subsequently receives packets with a source or destination address that matches the IP address, the network appliance classifies the received packets as belonging to the content server or a network application associated with the content server.

Abstract: A mobile computing device, such as a mobile phone, serves as a wireless hotspot for other mobile computing devices. The other mobile computing devices connect to the mobile phone over a wireless computer network, and the mobile phone connects to the Internet over a mobile phone network. The wireless computer network may be a WiFi network and the mobile phone network may be a 3G network. The mobile phone may include a lightweight anti-malware client for screening network traffic between the other mobile computing devices and web servers on the Internet. The lightweight anti-malware client may consult a cloud security network for reputation of data included in the network traffic.