Abstract: An efficient low carbon monoxide burner system for decorative gas logs is further provided with one or more pipe branches which provide glowing embers in front of and/or on the bottom of decorative gas logs placed over the gas log burner system. The pipe branch which provides the glowing embers is provided with decorative ember flame holes which are arranged directly juxtaposed expanded fire resistant material which is heated so as to form a glow material for producing glowing decorative ember flames in front of or at the bottom of the decorative logs in a manner which produces low carbon monoxide. The pipe branch for providing decorative flames between logs is provided with nozzles for directing the flames away from the logs.

Abstract: A phase detector for a multi-channel PSK receiver is provided with a plurality of phase channels. Each of the phase channels has its own comparator coupled to an electronic switch for producing signals which are the products of the analog data inputs on the phase channels. The outputs from the electronic switches are connected to positive and negative summing circuits and the output of the positive and negative summing circuits are connected to the positive and negative inputs of a differential amplifier which produce a sum of the difference of the absolute value of the analog data inputs which is employed as an error voltage signal to control the frequency of a voltage controlled oscillator in a multi-channel PSK receiver. By eliminating convention analog multipliers in the phase detector, the phase detector is capable of generating error voltage signals from analog data input signals having data rates as high as 5 gigabytes per second.