Patent
Voltage controlled oscillator (VCO) with symmetrical output and logic gate for use in same
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TLDR
In this article, a voltage controlled oscillator (VCO) includes a periodic signal generator (30), a comparator (42) followed by a latch (43), and a logic gate such as a NAND gate (31) connected to the output of the latch to adjust for asymmetries in the output signals from the latch.Abstract:
A voltage controlled oscillator (VCO) (23) includes a periodic signal generator (30) such as a comparator (42)followed by a latch (43), and a logic gate such as a NAND gate (31) connected to the output of the latch (43) to adjust for asymmetries in the output signals from the latch (43). In one embodiment, the NAND gate (31) includes two pullup transistors (80, 81) receiving first and second output signals from the latch and connected between a first power supply voltage terminal and an output node (86). Two switching branches (82, 83 and 84, 85) each including two transistors are connected between the output node (86) and a second power supply voltage terminal. The order of the input signals received by the two transistors is reversed between the two switching branches (82, 83 and 84, 85) to compensate for any duty cycle asymmetries. A frequency divider (32) divides the output of the NAND gate (31) to complete the duty cycle adjustment.read more
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References
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Journal ArticleDOI
MOS oscillators with multi-decade tuning range and gigahertz maximum speed
TL;DR: In this paper, the authors studied the realization of fully integrated MOS oscillators with multidecade tuning range and top speed exceeding 1 GHz, and found that the best approach for high-speed, wide-range specifications is the relaxation network of the constant current charge type.
Patent
Apparatus and method for translating ECL signals to CMOS signals
TL;DR: In this paper, an ECL to CMOS level translation circuit using a dynamic, internally generated reference voltage to translate ECL-level signals into CMOS-level signal is presented.
Patent
Fully-differential relaxation-type voltage controlled oscillator and method therefor
TL;DR: In this paper, a fully differential relaxation-type voltage controlled oscillator (VCO) includes an operational transconductance amplifier (OTA) for receiving a differential input voltage, and a comparator having hysteresis detects the charge on the capacitor.
Patent
BicMO logic circuit
TL;DR: In this article, a logic circuit comprises an input section for inputting a signal and outputting an output signal through a CMOS inverter circuit; an output section having first darlington-connected bipolar transistors and a bipolar transistor to the first bipolar transistor in the shape of a totem pole, and a control section having CMOS transistors operated on the basis of the output signal of the input section.
Patent
Ecl to ttl voltage level converter using cmos and bicmos circuitry
TL;DR: In this article, additional transistors are serially inserted in a level conversion circuit that configures a flip-flop with N-channel transistors and P-Channel transistors, and outputs TTL level output signals by converting ECL level input signals.
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